The document discusses different types of mode selective devices that can be used for mode multiplexing over few-mode fiber. Free-space based devices are bulky while fiber based devices are more compact and easier to integrate. Early demonstrations transmitted data over 107 Gb/s using the LP01 and LP11 fiber modes and 58.8 Gb/s using dual modes with electronic MIMO processing for mode separation. Mode selective devices can be categorized as either free-space based or fiber based, with fiber based being preferable due to their compact size and integration capabilities.

1. Types Of Window Being Used For The Selected Granule
lock_type – only used if the flag has been set. It specifies the type of window being used for the selected granule. The value 00 is
unethical (as it is a 2 bit variable, which can be referred in the memory allocation table) as block_type is only used when normal
windows are not in use. mixed_blockflag – only triggered if flag from he windows_switching_flag has been set. It is responsible to
indicate the various types of windows that are currently in use in the low and high frequencies. The two lowest subbands are processed
using a normal window and the remaining 30 subbands are processed using the window given by the block_type_variable. table_select
– There are various Huffman coded tables that are encoded during the encoding process of MP3. table_select selects the correct
Huffman table for each region, granule and channel based on the maximum quantised value and local statistics of the 576 frequency
lines of the audio signal. However, the table_select inlet decodes the big_values by choosing one of the 32 Huffman tables that are
predefined but they ISO. subblock_gain– In the event of short windows being chosen over long windows (block_type = 2) by the
window_switching_flag, the variable subblock_gain is used which outputs as the gain offset from the global gain for each subblock and
the calculation is done diving the values of the subblock by 4 (subblock_gain[window]) region0_count and region1_count – the
big_values are further broken down to two regions names region0
... Get more on HelpWriting.net ...

3. Fpgas Advantages And Disadvantages
I. INTRODUCTION With the advent of modern controls theory and in the semiconductor technology, the use of high sophisticated
technologies, advance digital controllers and embedded systems which include microprocessors, DSPs (digital signal processors),
ASICs (application–specific integrated circuits), and FPGAs (field–programmable gate arrays).in the area of AC power control have
become global challenges nowadays[1]. Recently FPGAs have become a good alternative answer and have been generally accepted as a
tool for the controller`s platform in high performance embedded control system[2]. This device completely give inventors the ad–liberty
to use their design customs adapted to their area of applications, by allowing both hardware and software to be customized at very low
cost[3], it has a key impact on hardware or software co–design and they are used as devices for rapid pro–to typing, and for final
products[4]. This find application in sophisticated motor drive systems, such as fully integrated controllers, sensor less control, sensor
less control with an extended Kalman filter algorithms, and adaptive fuzzy based controller[5]. Also in some application like Intelligent
maximum power point trackers for photovoltaic applications, Realization of active power filter based on indirect ... Show more content
on Helpwriting.net ...
Indeed, these devices belong to the so called semi–custom Application Specific Integer Circuits (ASICs). The latter low cost devices
consist of predesigned (by the manufacturer) elementary cells and interconnections that can be programmed and interconnected by the
user. This has the credit to allow rapid–prototyping solutions and make the design process more flexible and cheaper. This is not the
case for full–custom ASICs, which are manufactured for a specific application and cannot be user
... Get more on HelpWriting.net ...

5. Simulated Results And Analysis Of A Ver Of The System
All rotated symbols are fed into a decision circuit and the squared distance |dk,b|2 to the closest constellation point is calculated in the
complex plane:
|d_(k,b) |^2=|Z_k e^(jφ_b )–X ^_(k,b) |^2 (4.12)
Where Xk,b is the decision of Zkejφb. After the DSP compensation for the optical fiber linearities the signal is passed through the
threshold detector (Decision) and at the QAM decoder to decode the original signal transmitted. The two QAM decoder for the X–
polarization and the Y–polarization bit sequences are finally passed through the parallel to serial converter and the BERT (Bit Error
Rate Test) to calculate the average BER of the system. The average BER calculated is used for the analysis of noise i.e the phase noise
and ... Show more content on Helpwriting.net ...
Further analysis of DP 16–QAM has been done in terms of average Bit error rate(BER) and optical signal to noise ratio(OSNR) in order
to analyse the Phase noise and Gaussian noise.
In the proposed design sweep iterations has been used in the optical signal to noise ratio (OSNR) component and the BER TEST SET
component. On using the feature of the simulator in order to make nested parameters, and thus obtaining the required average BER.
With the higher order 16–QAM it is not easy to decide the filter to be used having minimum noise so graph have drawn between
Average BER versus OSNR.
The graph is taken before carrier phase estimation (CPE) in order to analyse the Phase Noise. The required graph for phase noise in
terms of average BER for different filter types with varying filter order are drawn in Figure 4.7(a)–(d). The graph is drawn between the
average BER and OSNR which shows that with the increase in OSNR the BER decreases. In another way with the increase in noise the
average bit error rate increases. There is a value fixed theoretically for each modulation technique above which OSNR cannot be
permitted in the system. Figure 4.7(a) Butterworth filter 4th order before CPE Figure 4.7(b) Chebyshev filter 3rd order before CPE
Figure 4.7(c) Bessel filter 3rd order before CPE Figure 4.7(d) Gaussian filter 3rd order before CPE Figure 4.7(a)–(d) shows the graph
drawn between average bit error rate and the
... Get more on HelpWriting.net ...

7. Hardware Efficient Delta Sigma Linear Processing Circuits
Abstract: This paper presents hardware efficient Delta Sigma linear processing circuits for the next generation low power VLSI device
in the Internet–of–things (IoT). We first propose the P–N pair method to manipulate both the analog value and length of a first–order
Delta Sigma bit sequence. We then present a binary counter method. Based on these methods, we develop Delta Sigma domain on–the–
fly digital–signal–processing circuits: the Delta Sigma sum adder, average adder, and coefficient multiplier. The counter–based average
adder can work with both first–order and higher–order Delta Sigma modulators and can also be used as a coefficient multiplier. The
functionalities of the proposed circuits are verified by Matlab simulation and FPGA implementation. We also compare the area and
power between the proposed Delta Sigma adders and a conventional multi–bit adder by synthesizing both circuits in the IBM 0.18 µm
technology. Synthesis results show that the proposed Delta Sigma processing circuits can extensively reduce circuit area and power.
With 100 inputs, a Delta Sigma average adder saves 94% of the silicon area and 96% of the power compared to a multi–bit binary
adder. The proposed circuits have the potential to be widely used in future miniaturized low power VLSI circuits.
Keywords: VLSI, Delta Sigma Modulation, Digital Signal Processing, Adder, Coefficient Multiplier, Low–power Low–complexity
Circuits.
1. Introduction
Internet–of–Things (IoT) demand ubiquitous
... Get more on HelpWriting.net ...

9. Frequency Adaptive Repetitive Control Of Grid Connected...
Frequency Adaptive Repetitive Control of Grid–connected Inverters Rabia Nazira,b, Keliang Zhoub, Neville R. Watsonb, Alan Woodb a
Electrical Engineering Department, Lahore College for Women University Lahore, Pakistan. bElectrical and Computer Engineering
Department University of Canterbury, Christchurch, New Zealand. Abstract–Grid–connected inverters (GCI) are widely used to feed
power from renewable energy distributed generators into smarter grids. Repetitive control (RC) enables such inverters to inject high
quality fundamental–frequency sinusoidal currents into the grid. However, digital RC which can get approximately no tracking error of
any periodic signal in steady–state whose period is known, cannot exactly track or reject periodic signal of frequency variations. Thus
digital RC would lead to a significant power quality degradation of GCIs when grid frequency varies and causes periodic signal with
non–integer periods. In this research paper a repetitive control scheme capable of frequency adaptation (FARC) at a predefined
sampling rate is proposed to deal with all types of periodic signal of variable frequency. A fractional delay filter which is based on
Lagrange interpolation is used to estimate the fractional period terms in RC. This proposed FARC controller offers the fast during
process modification of fractional delay and fast revise of filter parameters, and then provides GCIs with a simple but very accurate
existent time frequency adaptive control
... Get more on HelpWriting.net ...

11. Different Types And Modes Of Mode Selective Devices
LP11 modes (LP11a+LP11b) and even all three modes (LP01+LP11a+LP11b)over few–mode fiber (FMF)The transmission system with
mode multiplexing are a very crucial problem. The mode selective devices proposed in divided into two major categories: free–space
based (FSB) and fiber based(FB).Free space components are bulky in size ex liquid–crystal–on–silicon (Lcos) spatial light modulator
(SLM). But fiber based mode selective device have compact and easiness of integration. .Firstly proposed 107–Gb/s coherent optical
OFDM (CO–OFDM) transmission over a 4.5–km two–mode fiber using LP01 and LP11 modes. Secondly proposed 58.8–Gb/s CO–
OFDM transmission using dual modes where the mode separation is achieved via 4× 4 electronic MIMO processing [10]. ... Show more
content on Helpwriting.net ...
Transfer of energy from one ideal mode to another during propagation only due to mode coupling. It has been observed that practically
strong couple modes having equal or nearly equal propagation constant but weakly coupled modes having a highly unequal propagation
constant. The separation between two modes results in modal dispersion increasing capacity through mode division multiplexing
(MDM). SMF ( single–mode fiber helps in the wave movement in two polarization conditions. Polarization–mode dispersion (PMD)
and polarization–dependent loss (PDL) have long been described by field coupling models. It has been observed that strongly coupled
modal group delay or gain depend only no. of modes and variance of accumulated delay or gain and can be derived from the eigenvalue
distributions of certain random variables[12].
SDM (space division multiplexing) has been putforth by Savory. SDM is extremely challenging technology, of requiring developments
in all areas of Photonics Technology. The optical communication systems are being upgraded every day .There is a rapid development
taking place in this field at the global level in the space division multiplexing. Space Division Multiplexing (SDM) is conceptually
simple, SDM is extremelychalleng technologically, requiring the development of new fibers, amplifiers, multiplexers, digital signal
processing circuits, and other components. The multiplexing means the utilization of channel by the division of the space. It is
... Get more on HelpWriting.net ...

13. Important Technologies Of Dsp And Reason Behind Its...
Nijo John HW1 "Important Technologies in DSP and reason behind its importance" Digital signal processing (DSP) is the numerical
manipulation of signals, usually with the intention to measure, filter, produce or compress continuous analog signals. It is characterized
by the use of digital signals to represent these signals as discrete time, discrete frequency, or other discrete domain signals in the form
of a sequence of numbers or symbols to permit the digital processing of these signals. In this digital Era, Signal processing plays an
important role in making our life much easier. The important theorems and technologies used in Signal Processing are Image
Processing, Biomedical Signal Processing, Fourier Transform, Convolution, and ... Show more content on Helpwriting.net ...
Image processing must be approached in a manner consistent with the scientific method so that others may reproduce, and validate, one
's results. This includes recording and reporting processing actions, and applying similar treatments to adequate control images. Image
Processing helps in Medical fields to detect severe diseases like cancer. For the security devices, Image Processing plays an important
role. So In our day–to–day life, Digital Signal Processing especially Digital Image processing has its own major contributions to make
it easy. 2. Biomedical Signal Processing Our bodies are constantly communicating information about our health. This information can
be captured through physiological instruments that measure heart rate, blood pressure, oxygen saturation levels, blood glucose, nerve
conduction, brain activity and so forth. Traditionally, such measurements are taken at specific points in time and noted on a patient's
chart. Physicians actually see less than one percent of these values as they make their rounds and treatment decisions are made based
upon these isolated readings. Biomedical signal processing involves the analysis of these measurements to provide useful information
upon which clinicians can make decisions. Engineers are discovering new ways to process these signals using a variety of mathematical
formulae and algorithms. Working with traditional biomeasurement tools, the signals can be
... Get more on HelpWriting.net ...

15. Using Kalman Filter Is Digital Signal Processing Based Filter
2.4 VIDEO DENOISING
Nowadays digital cameras which is used to capture images and videos are storing it directly in digital form. But this digital data ie.
images or videos are corrupted by various types of noises. It may cause due to some disturbances or may be impulse noise. To suppress
noise and improve the image performances we use image processing schemes. In this paper they uses Kalman filter to remove the
impulse noise. The Kalman filter is digital signal processing based filter. It estimates three states past, present and future of a system.
[10] To remove noise from video sequences they utilize both temporal and spatial information. In the temporal domain, by collecting
neighbouring frames based on similarities of all images, to remove noise from a video tracking sequence they given a low–rank matrix
recovery phenomena. [11]
3. METHODOLOGY ADOPTED
3.1 Wavelength De–noising
3.2 Bilateral De–noising
3.1 WAVELENGTH DENOISING
Basically a wavelet is small wave, which has its energy concentrated in time to give a tool for the analysis time varying phenomena. It
is easier to remove noise from a contaminated 1D or 2D data using these algorithms to eliminate the small coefficient associated to the
noise. In many signals, mostly concentration of energy is in a small number of dimensions and the coefficients of these dimensions are
relatively large compared to other dimensions (noise) that has its energy spread over a large number of coefficients. In wavelet
thresholding
... Get more on HelpWriting.net ...

17. Digital Signal Processing Quiz
TUTORIAL SHEET –1 (DIGITAL SIGNAL PROCESSING) 1.What are the basic elements of digital signal processing. List the
advantages of digital signal processing over Analog signal processing? 2. Give the classification of signals (a) Continuous time signals
and discrete time signals. (b) Deterministic and Non–Deterministic signals (c) Periodic and Aperiodic signals (d) Even and Odd signals
(e) Energy and Power signal 3.Determine whether the following signals are power or Energy signals or neither (a) x(t)=A sin t –∞ < t <
∞ (b) x(t)= u(t) (c) x(t)=r(t)= tu(t) 4.Determine the even and odd parts of ... Show more content on Helpwriting.net ...
List the advantages of digital signal processing over Analog signal processing? 2. Give the classification of signals (a) Continuous time
signals and discrete time signals. (b) Deterministic and Non–Deterministic signals (c) Periodic and Aperiodic signals (d) Even and Odd
signals (e) Energy and Power signal 3.Determine whether the following signals are power or Energy signals or neither (a) x(t)=A sin t –
∞ < t < ∞ (b) x(t)= u(t) (c) x(t)=r(t)= tu(t) 4.Determine the even and odd parts of the unit step signal u(n). 5. Determine whether the
corresponding system is causal or Non–causal. (a) y(t)=sin x(t) (b) y(n)=nx(n) (c) y(n)=x(–n) TUTORIAL SHEET –1 (DIGITAL
SIGNAL PROCESSING) 1.What are the basic elements of digital signal processing. List the advantages of digital signal processing
over Analog signal processing? 2. Give the classification of signals (a) Continuous time signals and discrete time signals. (b)
Deterministic and Non–Deterministic signals (c) Periodic and Aperiodic signals (d) Even and Odd
... Get more on HelpWriting.net ...

19. A Software Implementation Of Delayed Lms Adaptive Filter...

A Software Implementation of Delayed LMS Adaptive Filter for Noise Cancellation
Prajakta P. Bharadkar, Mrs.Rohita P. Patil
Abstract– Noise in signal records is caused by various factors which increase the difficulty in analyzing the signal and to obtain proper
information. To design specific filters to decrease such noises in signal records is necessary. Hence efficient architecture of Delayed
LMS (DLMS) algorithm is proposed which supports pipelining and avoid long critical path. A novel partial product generator and a
strategy for optimized balanced pipelining across the time–consuming combinational blocks of the structure are used. It also
concentrates on minimizing the adaption delay and area. The proposed system is implemented in verilog HDL language using Xilinx
14.2 and simulated using Modelsim simulator.
Index Terms– Noise, Adaptive Filter, DLMS Algorithm, Critical Path, Pipelining, Verilog HDL.
INTRODUCTION
The signals are affected with noise and loss important information. Hence, the signals have to be cleaned up with digital signal
processing tools before they are stored, transmitted, or played out. A variety of noise cancellation algorithms have been proposed in the
literature. This can be achieved in many different ways, such as beam forming, adaptive, temporal, spatial–temporal filtering, etc. One
of the most widely used techniques is Lest Mean Square (LMS) adaptive filtering. It restores the desired signal by passing the noisy
signal through a Finite
... Get more on HelpWriting.net ...

21. The Digital Signal Processing Applications
CHAPTER 1
INTRODUCTION
With advent of modern high–performance signal processing applications, high throughput is in great demand. Digital Signal Processing
is perhaps the most important enabling technology behind the last few decade's communication and multi–media revolutions. Most
recent research in the digital signal processing (DSP) area has focused on new techniques that explore parallel processing architectures
for solutions to the DSP problems .DSP is used in a numerous real time application related with the VLSI technology such as wireless
communication, transmission system, multimedia, digital video, digital audio and radar system. The field of DSP has always been
driven by the advances in VLSI technologies. With the advances in ... Show more content on Helpwriting.net ...
Loop transformation techniques are applied extensively on loop intensive behaviors in design of area/energy efficient systems in the
domain of multimedia and signal processing applications. These are also commonly used during high–level synthesis for optimization
purposes. One of the most popular loop transformation techniques is retiming, which improves the performance of the system. Retiming
relocates the delays or registers within a circuit without altering the functionality. As relocating the delays or registers balances the
critical path and reduces the states of the circuit.
CHAPTER 2
LITERATURE SURVEY
Graphical representation are efficient for investigating and analyzing the data flow properties of DSP system and for exploiting the
inherent parallelism among the different subtask. More importantly graphical representation can be used to map DSP algorithm to
hardware implementation. This graphical representation can build the gap between algorithmic description and structural
implementation. It exhibits all parallelism and data driven properties of the system and provide an insight into space and time tradeoffs.
2.1 DATA FLOW GRAPH
In Data Flow Graph (DFG) representation, the nodes represent computations and the directed edges represent data path and each edge
has a non–negative number of delays associated with it.
The DFG captures the data driven property of DSP algorithms where any node
... Get more on HelpWriting.net ...

23. The Principle Of Ultrasound Imaging System
DESCRIPTION:
PRINCIPLE OF ULTRASOUND IMAGING SYSTEM:
The main principle of ultra sound imaging system is to transmit ultra sound burst signals into the particular organ and produced echo is
processed for imaging.
The entire system is mainly classified as two PCB boards:
i. FPGA based transmitter board and control. ii. AWG and transceiver.
 The system architecture mainly includes
i. Transducer array ii. 8–Channel Transmitter iii. 8– Channel Transceiver iv. High voltage pulse
v. Digital TX beam former vi. FPGA device vii. User interface (Computer) viii. Analog front end(AFE) ix. Signal processing modules
a. Transducer array. Medical ultra sound imaging transducer are excited in two modes
i. Linear array mode ii. Phased array mode
Linear array mode: Subset of transducer elements are excited
Phased array mode: All elements are excited to focus at the sharp ultra sound beam at the defined focal point.
 For the transducer array; the parameter piezo–electric element (electric charge generated with respect to the applied mechanical
stress) pitch size is to smaller than that of half of the wavelength.
Figure () : PIEZO–ELECTRIC EFFECT REPRESENTATION
 In transducer arrays, ultra sound transducer are arranged in the form of an array
DIAGRAM
A large piezo–electric element by crystal is divided into smaller active elements. These elements are placed in different compartments
which can be prevented
... Get more on HelpWriting.net ...

25. Wireless Communications, The Radio Industry
With the recent surge in wireless communications, the radio industry has seen an increase in the number of different communication
standards each requiring its own specific hardware and processing. Our project addresses the need for radio interoperability with these
various standards through the development of hardware generators for a software defined radio (SDR) system. These hardware
generators will be created using Chisel, a hardware construction language. When given a set of parameters or constraints, the hardware
generators will automatically output circuit designs for the given application thereby accelerating the hardware design process and
introducing a new method for multi–standard support. Specifically, our team will focus on the development of generators for the
system's beamforming and MIMO blocks. For this reporting period, our team was responsible for updating our previous CORDIC block
for incorporation in the carrier frequency offset correction (CFO) block. To refresh, the CORDIC block is simply a set of hardware
efficient algorithms capable of performing hyperbolic and trigonometric calculations without the use of a hardware multiplier. By
avoiding use of hardware multipliers, the CORDIC architecture reduces the number of logic gates required to perform these
trigonometric calculations thereby saving significant circuit power and area in exchange for less accuracy. The work breakdown for this
task is depicted in the diagram below (see Figure 1). This task
... Get more on HelpWriting.net ...

27. Information Technology And The Digital Signal
Nelson Information Technology VCE Units 1 & 2
Chapter 2: Networks
Communications
1 Describe the difference between an analog signal and a digital signal.
A–1 An analog or analogue signal is any continuous signal for which the time varying feature (variable) and A digital signal is a
physical signal that is a representation of a sequence
2 What is the function of a dial–up modem?
A–2 Access a computer system or service remotely
Networks
3 What is a network? How is a local area network (LAN) different from a wide area network (WAN)?
A–3 A computer network is a network which allows computer to exchange data. A lan only covers small areas like schools, café, offices
whereas WAN covers large geographical areas like cities, states, nations.
4 Describe the five main advantages of using a network over standalone computers.
A–4 You can share files with all the other computers on the network. You can share printers. You can share pics and movies.
5 Why is user dependence considered a possible disadvantage of networks?
A–5 server faults stop application being available. network faults could lead to loss of resources. network faults can cause loss of data.
6 What problems could eventuate if a network is not well managed?
A–6
7 Describe four important tasks of a network operating system.
A–7
8 Identify the network operating system used in your school.
A–8 Windows Vista 32bit
9 How does a peer–to–peer network differ from a client–server network?
A–9 Peer–to–peer: network there are no
... Get more on HelpWriting.net ...

29. Important Technologies Of Dsp And Reason Behind Its...
HW1 "Important Technologies in DSP and reason behind its importance" Nowadays, digital data is everywhere. In this digital Era,
Signal processing plays an important role in making the life easy. The important theorems and technologies in Signal Processing are 1.
Image Processing 2. Biomedical Signal Processing 3. Fourier Transform 4. Convolution 5. Sampling Theorem 1. Image Processing
Image processing is often viewed as arbitrarily manipulating an image to achieve an aesthetic standard or to support a preferred reality.
However, image processing is more accurately defined as a means of translation between the human visual system and digital imaging
devices. The human visual system does not perceive the world in the same manner as ... Show more content on Helpwriting.net ...
2. Biomedical Signal Processing Our bodies are constantly communicating information about our health. This information can be
captured through physiological instruments that measure heart rate, blood pressure, oxygen saturation levels, blood glucose, nerve
conduction, brain activity and so forth. Traditionally, such measurements are taken at specific points in time and noted on a patient's
chart. Physicians actually see less than one percent of these values as they make their rounds and treatment decisions are made based
upon these isolated readings. Biomedical signal processing involves the analysis of these measurements to provide useful information
upon which clinicians can make decisions. Engineers are discovering new ways to process these signals using a variety of mathematical
formulae and algorithms. Working with traditional bio–measurement tools, the signals can be computed by software to provide
physicians with real–time data and greater insights to aid in clinical assessments. By using more sophisticated means to analyse what
our bodies are saying, we can potentially determine the state of a patient's health through more non–invasive measures. Real–time
monitoring can lead to better management of chronic diseases, earlier detection of adverse events such as heart attacks and strokes and
earlier diagnosis of disease. Biomedical signal processing is especially useful in the critical care setting, where patient data must be
analysed
... Get more on HelpWriting.net ...

31. Signal Flow:VI4 is a Digital Soundboard Provided by...
Signal Flow: VI4
The VI4 console is a Digital Soundboard provided by Soundcraft which features 3 input banks of 8 channels for up to 48 total mono
inputs, 1 output bank of 8 channels for up to 27 outputs, 24 insert sends/returns and 24 total buses which can be used as groups, aux or
up to 16 total matrixes as well as midi in/out and 2 power supplies, one for main and another as an auxiliary for redundancy. Its Local
rack has 19 analogue inputs, 8 pairs of AES/EBU, 16 GPIO In/out and a 64ch MADI In. The Stage rack offers 48 analogue inputs, 24
outputs and 8 GPIO in/out.
Signal Starts with the microphone on one end connected into the stage box with standard XLR cables, which through analogue to digital
conversion in the box, is then sent out into the local rack via Ethernet networking which sends uncompressed, low latency audio signals
over standard Ethernet network. Type of cable used determines the maximum distance connection can travel until it begins to have a
loss, ie; 80m for Standard Cat5e, 130m for Cat7, 1500m with single optical fibre and 600m with 3x200m reels of multimode 50/125
optical fibre in series. Aside from a main out for the Ethernet cable there is an auxiliary out to act as redundancy in the event that the
primary Ethernet cable runs into any problems. The Local Rack acts not only as another A/D Converter if any mic is connected from
this point but also as the Digital Signal Processor which enables mathematical manipulation of analogue signals which
... Get more on HelpWriting.net ...

33. Advantages And Disadvantages Of Multirate Strategies
Abstract:– Multirate strategy is necessary intended for methods along with various enter along with productivity choosing premiums.
The latest improvements with mobile computing along with transmission programs demand minimal energy along with excessive
swiftness VLSI DSP methods [4]. That Cardstock offers Multirate quests employed for selection to provide transmission running with
instant transmission technique. Several buildings designed for that design of minimal complexity, tad parallel Multiple Continual
Multiplications function which in turn characterizes this complexity of DSP methods. On the other hand, main drawbacks of current
strategies usually are often too costly or perhaps not necessarily efficient enough. In contrast, MCM along ... Show more content on
Helpwriting.net ...
That Multirate design technique is actually thorough in addition to relevant to a lot difficulties. There are several reasons to alter the
trial price of any experienced facts indicate. Multirate filtration are interfaces involving constant & experienced facts that brings about a
cost lessening parts together with development involving indicate excellent. Much of the investigation effort involving way back when
a long time in the area involving electronic digital gadgets may be aimed towards growing the swiftness involving electronic digital
systems. Just lately, the requirement involving portability and the modest development throughout battery power efficiency show that
energy dissipation is probably the most essential design variables. This most critical variables for you to measure the caliber of some
sort of routine are region, wait in addition to energy dissipation although challenging large swiftness. For this reason, throughout latest
VLSI systems the ability wait product turns into probably the most crucial metric involving efficiency. This shown technique supplies a
thorough method to obtain routine technique for large swiftness functioning in a lower provide voltage. It truly is normally
acknowledged that lower energy circuits are really slower circuits in addition to large swiftness circuits expected very good energy use.
In numerous practical application involving electronic digital indicate finalizing, there exists a difficulty involving altering the testing
price of any indicate, both growing that or even minimizing that by simply some sum [2][5]. Telecommunication program transfers in
addition to receives the various kinds of signals e. gary. fax, conversation, video etc. There exists a prerequisite for you to course of
action different signals in the diverse costs with similar signals bandwidth. Digital camera sound executive can be an region which
includes benefited
... Get more on HelpWriting.net ...

35. Ofdm Transmission By Stephen Kiambi
OFDM transmission
Author: Stephen Kiambi
Department of Electrical and Information Engineering, University of Nairobi
OFDM or Orthogonal Frequency Division Multiplexing is a transmission scheme that is widely used in broadcast and wireless
communication technologies. Some of the applications employing OFDM include Digital Audio Broadcast (DAB), Digital Video
Broadcasting Terrestrial (DVB–T2), Wireless–LAN, Worldwide Interoperability for Microwave Access (WiMAX) and 4G Long Term
Evolution (LTE) radio technologies [1, 2]. Two of the main reasons to use OFDM are to increase date rates and robustness against
frequency–selective fading. In the rest of this document an overview of OFDM transmission theory is given.
1 Basic principles of OFDM
OFDM is a multicarrier transmission technique that splits the total available bandwidth into many narrowband sub–channels at
equidistant frequencies. The sub–channel spectra overlap each other but the subcarrier signals are still orthogonal. The single high–rate
data stream is subdivided into many low–rate data streams for the sub–channels. Each sub–channel is modulated individually and all the
sub–channels are transmitted simultaneously in a superimposed and parallel form.
An OFDM transmit signal therefore consists of adjacent orthogonal subcarriers spaced by the frequency distance on the frequency axis.
All subcarrier signals are mutually orthogonal within the symbol duration, , if the –th unmodulated subcarrier signal is described
... Get more on HelpWriting.net ...

37. Digital Signal Processing
CHAPTER I INTRODUCTION
On systems that perform real–time processing of data, performance is often limited by the processing capability of the system [1].
Therefore, in order to judge the efficiency of any system it is very important that we evaluate the performance of the architectures based
on which the system is being built. We can also state that we can make a system more efficient and more capable by working upon the
algorithm on which the system is being built. The more efficient the algorithm is the more efficient will be our system and vice versa. It
is assumed that the way in which this chapter is written will provide the source of motivation for the thesis, it will also give an insight
of the work which is done and it is organized in the thesis.
1.1 Motivation
Digital signal processing (DSP) has been a major player in the current technical advancements such as noise filtering, system
identification, and voice prediction [2]. But, standard DSP techniques, are not equipped enough to solve these problems effectively and
obtain almost desirable results. Adaptive filtering is an answer to the problem and is being implemented to promote accurate solutions
and a timely convergence to that solution. Therefore, because of the high end capabilities of the adaptive techniques these are being
widely implemented in the fields like radar, communications, seismology, mechanical design and biomedical electronic equipments.
No matter how sophisticated adaptive
... Get more on HelpWriting.net ...

39. Analog and Digital Signal
ANALOG AND DIGITAL SIGNAL
1.1 Analog signal
An analog or analogue signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of
some other time varying quantity, i.e., analog to another time varying signal. For example, in an analog audio signal, the instantaneous
voltage of the signal varies continuously with the pressure of the sound waves. It differs from a digital signal, in which a continuous
quantity is represented by a discrete function which can only take on one of a finite number of values. The term analog signal usually
refers to electrical signals; however, mechanical, hydraulic, and other systems may also convey analog signals.
An analog signal uses ... Show more content on Helpwriting.net ...
In computer architecture and other digital systems, a waveform that switches between two voltage levels representing the two states of a
Boolean value (0 and 1) is referred to as a digital signal, even though it is an analog voltage waveform, since it is interpreted in terms of
only two levels.
1.3 Difference between digital and analog signal
Analog signal
1. It produces a continuous signal.
2. Signal that is continuous in a time and can assume an infinite number of values in a given range.
3. It is denoted by sine wave.
4. Analog hardware is not flexible.
5. It Store data in the form of wave signal.
6. Analog instrument consume more power.
7. It is of low cost and portable. For e.g.:– thermometer.
Wave form in analog signal Digital signal
1. It produce a discrete signal
2. Signal that is continuous in a time and assumes only a limited number of values.
3. It is denoted by square wave.
4. Digital hardware is flexible in implementation
5. It store data in the form of binary bit.
6. Digital instrument consume less power.
7. It is expensive and not easily portable. For e.g.: computers.
Wave form in digital
... Get more on HelpWriting.net ...

41. Advantages And Disadvantages Of Wavelets
Wavelets, based on time–scale representations, provide an alternative to time–frequency representation based signal processing.
Wavelets are then represented by dilation equations, as opposed to difference or differential equations. Wavelets maintain orthogonality
with respect to their dilations and translations. Orthogonality of wavelets with respect to dilations leads to multigrid representation.
Wavelets decompose the signal at one level of approximation into approximation and detail signals at the next level. Thus subsequent
levels can add more detail to the information content. The perfect reconstruction property of the analysis and synthesis wavelets and the
absence of perceptual degradation at the block boundaries favor use of wavelets ... Show more content on Helpwriting.net ...
The same procedure is adapted to obtain one level 2–D DWT by using two vertical filters as shown in Fig. 1. Implementation results are
discussed in section 4. The advantage of flipping method is it requires only four multipliers and eight adders instead of eight multipliers
and four adders to implement 9/7 filter compare to lifting scheme. Main disadvantage of flipping is serial operation. In 1–D DWT of
FA, odd and even input samples are processed by five blocks namely , , , , (1 &2)in the cascade manner.1 &2are
scaling blocks. Since the output from one block is fed as the input to the next block, the maximum rate at which the input can be fed to
the system depends on the sum of the delays in all four stages. The speed may be increased by introducing pipelining at the points
indicated by dotted lines Fig.3. In this case, the input rate is determined by the largest delay among all four blocks.The delay in the
individual stages may be reduced further by using constant coefficient multiplier (KCM) which uses a look up table (LUT) for finding
the product of a constant and a variable. 2.2 Modified Flipping Architecture Modified flipping architecture (MFA) is implemented using
MBW–PKCM technique.
... Get more on HelpWriting.net ...

43. Engineering Application Essay
STATEMENT OF PURPOSE
The course of the evolution of my interest in engineering dates back to my childhood. It has begun in my high school. The kind of
environment in which I grew up is, both my parents were graduates in Mathematics and were proficient in the field of teaching
Mathematics in engineering level and high school level. So, due to their influence on me, I had developed my interest in the subject and
maths was at my fingertips. At that point, I was enthusiastic to learn about the applications of Mathematics. This lead to the important
stage in my life, the field of engineering.
My high school education and my performance in various competitive exams laid the path for me to pursue my bachelor of technology
degree in the field of Electronics and Communication Engineering which suited me better because of my fondness for mathematics and
my interest to study the applications of the subject. The place of study is Amrita School of Engineering, a college under Amrita
University, Bangalore which is known for its academic excellence which is ranked among the top 25 educational institutions in India.
During my bachelor's degree, I had been introduced to many versatile courses in ECE like Electric circuits, Digital systems,
Electromagnetics, Signals and Systems etc.,. I had scored good grades in all my subjects. I had to choose from paths in front of me –
Digital Electronics, Microelectronics, Signal Processing and Radio Frequency Engineering as my area of interest. Due to
... Get more on HelpWriting.net ...

45. Digital Signal Processing
With the advent of digitization in every field from communication to media, the need for methods to process digital signals is more
important than ever. Now that I am on the threshold of embarking on a career that will encompass a major part of my adult life, I think
it is natural that I veer towards Signal processing. As I look back, I feel that my natural inclination and excellence in mathematics from
childhood has led me along this path. Digital Signal processing incorporates the use of mathematics to manipulate an information signal
to modify or improve it in some way, fitting naturally into my area of strength and interest.
I graduated from high school with 97% in Physics, Chemistry and Maths as a result of which I was admitted in SSN, ranked amongst
the top engineering colleges in India. During my undergraduate study in Electronics and Communications Engineering I developed a
liking for subjects like Digital Communication, Digital Image Processing, Digital Signal Processing.etc which provided me with a
fundamental knowledge about digital signals and a thirst to explore more.
My actual venture into DSP, started during fifth semester holidays when I attend a course on "DSP Applications" conducted by IIT
Madras and Analog Devices. This gave me a great opportunity to work with several professors in IIT on projects like Noise
Cancellation, Image Restoration using Kalman filter.etc. Intrigued by this experience, I devoted more time towards studying various
fields in
... Get more on HelpWriting.net ...

47. Delta Sigma Based Digital Signal Processing
The proposed research focuses on Delta Sigma based Digital Signal Processing (DSP) circuits on Very Large Scale Integration (VLSI)
systems for low–power intelligent sensors –in particular on building systematic tools to study their design principles and fundamental
performance limits of energy–efficient low–complexity architectures and on the analysis of their practical advantages and limits.
Integrated intelligent sensors has emerged in a wide range of applications including health care, surveil– lance, environment
monitoring, smart buildings, and Internet–of–Things, etc, and has significantly benefited society due to alleviating certain monitoring
and processing tasks. However, novel applications such as wearable biomedical devices require further miniaturization of existing
state–of–the–art hardware while having more signal processing capability due to the need to perform real–time processing, i.e. not only
monitoring but also detecting abnormal physiological signals and providing help by calling a hospital or ambulance. One fundamental
problem with these applications is that the high–performance signal processing circuit consumes too much power, which limits system
battery lifetime or processing capability. Thus, these applications require the design of low–power signal processing hardware,
especially multiply–and–accumulate (MAC) circuits, which are widely used in linear signal processing algorithms. Accordingly, the
goal of the proposed research is to address these
... Get more on HelpWriting.net ...

49. Implementing A Flexible Open Architecture Based Radio System
Software defined radio (SDR) aims to overcome the limitation of the conventional radio by building a flexible open architecture based
radio system. Functional modules of the radio system are implemented on reprogrammable/reconfigurable hardware platforms using
software. So highly flexible. Useful for global roaming services as SDR is able to interoperate with different wireless protocols,
incorporate new services, and upgrade to new standards. Hence for implementing a given radio scheme, we required to identify the
BBBs, place them in appropriate position, replace the BBBs by the FUs and connect them through the switches. Data routing from the
output of one FU to the input(s) of one or more FUs can be achieved by providing appropriate control signals to the switches which is
generated by the software. Thus, by changing control signals of these switches, different communication schemes can be established.
However, the BBUs that are used in most of the schemes can be made static to reduce switching delay. The signal processing functions
(like adder, delay, multipliers, carrier oscillator generators etc) are computationally intensive and they exhibit spatial or temporal
parallelism or both. In SDR, the signal processing function are implemented in Software by simply downloading a new program and
hence it is possible to incorporate to new services. Efficient Signal processor for SDR is either a DSP processor or ASIC or FPGA.
ASIC /SOC offer low power Consumption, highest
... Get more on HelpWriting.net ...

51. Statement Of Purpose For Electronic Engineering
With this impression I often tried to find, "What is the difference between a successful person and an ordinary person. And since then, I
have been in a constant efforts to bridge the gap that separates the extraordinary from the ordinary.
My inclination towards automobiles , machineries and the latest technology exposed me to the wonders and possibilities of being an
Engineer. I excelled academically at school. I was a topper; I was in the top 10 students throughout in high school. I secured 88.67% in
school. I secured good marks in science subject, as that was my favourite subject and hence took admission for Diploma in Electronics
& Telecommunication for further studies. I secured top grades in my diploma studies due to which i got admission in College of
Engineering Pune (COEP). COEP is an autonomous institute of Government of Maharashtra which comes under top 50 engineering
institutes all over India. ... Show more content on Helpwriting.net ...
I take this opportunity to describe my educational background and career objectives that motivated me to gain a research career in
Electronic engineering. My undergraduate education has provided me a thorough exposure to the various opportunities available in
Electronics and telecommunications
... Get more on HelpWriting.net ...

53. Audio Amplifier System With Digital Delay Effects
Introduction
CE 3.1
The project "Audio amplifier system with digital delay effects" was completed as a major aspect of the Bachelor of engineering degree
from Dr. Ambedkar Institute of Technology.
Chronology : 2009
Geographical location : Bangalore
Organization Name : Dr. Ambedkar Institute of Technology
Project Name : Audio amplifier system with digital delay effects
Title of Position : Student
Background
CE 3.2
This career episode briefly outlines my commitment for the effective work in completing my task and the duties where I dealt with
specialized issues according to my learning. I have taken required care in furnishing all the details of veritable ... Show more content on
Helpwriting.net ...
CE 3.3.1
In our project, we implemented these effects using the concept of digital delay. Four types of effects are produced using a digital signal
processing kit TMS320C6713 which is programmed using C language. I converted an analog signal to a digital signal and processed for
the desired effect using a Digital Signal Processor (DSP). The enhanced output from the DSP is then converted back to an analog signal
and fed to a speaker. Digital circuitry was a perfect fit for the process of storing a signal and then playing it back at a specified time
interval. It also solved the problem of losing the high frequencies on longer delay times.
CE 3.3.2
I looked at the delay and realized that it is used as a sound enhancement and also can be used on virtually any instrument and on vocals.
I researched why delay is used in this application and electrical signal move at a much higher speed than sound. I learnt Delay is an
audio effect which records an input signal to an audio storage medium, and then plays it back after a period of time. Audio storage
refers to techniques and formats used to store audio with the goal to reproduce the audio later using audio signal processing to
something that resembles the original. I used the FIR echo algorithm that calculates the current output buffer value by adding the
current input buffer value to an input buffer value that occurred a certain amount of time in the
... Get more on HelpWriting.net ...

55. An Evaluation Of Lms Based Adaptive Filtering
ABSTRACT Current Method of speech enhancement has been developed with adaptive filtering approach. The removal of unwanted
signal i.e. noise from speech signals have applications ranging from cellular communications to front ends for speech recognition
system. This paper describes proficient algorithm for removal of noise from speech. An optimal evaluation of LMS based adaptive
filtering has been implemented for the observed noisy speech. This Algorithm is basic adaptive algorithm. This Adaptive algorithm has
been used in many practical applications as a result of its robustness and simplicity. In Future Enhancement Unbiased and Normalized
Adaptive noise reduction will use for speech improvement. Keywords – Adaptive filtering, LMS algorithm, MSE, Speech
Enhancement, UNANR. I. INTRODUCTION In Practical situations speech signals are corrupted by several different forms of noise
such as speaker sound, background noise like door slam fan running in background, car noise, TV noise and also they are concern to
distortion caused by communication channels; examples are low–quality microphone, room reverberation, etc. In all such situations
extraction of high resolution signals is an important task. Filtering techniques are mainly classified as adaptive and non adaptive
filtering techniques. Speech enhancement improves quality of signal by suppression of noise and reduction of distortion. The speech
enhancement tells about the growth of communication system. Enhancement means
... Get more on HelpWriting.net ...

57. Soundcraft Vi4, the Digital Console
Soundcraft Vi4 is a digital console by Soundcraft, which came out with the first mixing console in a flight case in 1973 where the music
touring was started. The Vi series were being design as digital desk and are able to do both the touring, broadcast and installed sound
scene.
There are three main components in the Vi4 system which is a control surface, local rack and a stage box. Vi4 system stage box come
with 48 mono inputs on and a total of 24 output busses that can be used for matrices, auxes, group or masters and all the 48 mono inputs
are able to be linked and create stereo channel. Basically it functions as a stage box that located on the stage and able to send 48 mono
channels from the back of the stage box to the back of the local rack just by using one standard fit CAT 5 cable with Amphenol RJF
connectors. The maximum cable run using flexible reel–mounted Cat5 cable is 100m, but possible to get it run 130m with permanent
installation Cat7 cable. Another optional connection is using Fiber Optic cable but the Fiber Optical interface card need to install
separately.
The Local rack place at the same place with control surface and inside it is 2 Digital Signal Processing engine – Studer Score Live
technology, with only 2 DSP cards will be capable of 64 inputs with 40–bit floating–point digital processor and one or multiple D21m
I/O frames. The D21m high density I/O system holds up all the inputs and outputs to produce ultra–low noise balance mic amp and
sends it to
... Get more on HelpWriting.net ...

59. Essay On Fiber Communication System
There are certain inherent flaws with the optical transmission system like inter–symbol interference and noise. This distortion is
introduced by the narrow bandwidth and some distortions due to the media through the optical signals travel. The linear transversal
filter is used to reduce symbol interference. The system designed to remove unknown distortion is called an adaptive equalizer. The
corrective measure is to identify the distortion and adjust accordingly with the objective to remove it. The equalizer can be the
supervised or unsupervised type. In the TV or radio Transmission, blind equalizers are used. The literature survey of analysis of mean
square error and space division multiplexing technique and other system removing the ISI ... Show more content on Helpwriting.net ...
The equalizer converges to higher MSE. The noise PSD directed method iterated over 3000 km transmission on all six modes and it
tends to convergence at same MSE to get the standard –10 dB normalized MSE (NMSE).The noise PSD directed algorithms require 47
blocks and the conventional algorithm needs 48 blocks [6]. Sean O¨Arık et.al have proposed Long–haul mode–division multiplexing
(MDM) for adaptive multi–input–multi–output (MIMO) equalization to reduce for modal crosstalk and modal dispersion. To minimize
computational complexity, use MIMO frequency–domain equalization (FDE).Polarization division multiplexing (PDM) system use
single mode fiber but its transmission effected by noise, fiber nonlinearity and dispersion. In multi–mode fiber (MMF) with multi–
input–multi–output (MIMO) transmission Increasing per–fiber capacity can be achieved more readily by increasing spatial
dimensionality the total number of dimensions available for multiplexing, including spatial and polarization degrees of freedom denoted
by D. In first case two polarization modes of single mode fiber using D=2. This is made possible by equalization techniques goes on
going up with the upward drift of D and higher group delay. In second case systems using modedivision multiplexing (MDM) in MMFs
(D>2) receiver, computational complexity increases because of an increase in D and because of the large group delay (GD) spread
... Get more on HelpWriting.net ...

61. Digital Time Signal Processing
BE EXTC D T S P DEC– 2004 By Kiran Talele ( talelesir@yahoo.com ) Q 1. (a) FIR filter described by the difference equation : y(n) =
x (n) + x (n – 4) (i) Compute and sketch magnitude and phase response. [4] ⎛π ⎞ ⎛π ⎞ (ii) Find its response to the input x(n) = cos⎜ n
⎟ + cos⎜ n ⎟, − ∞ < n < ∞. ⎝2 ⎠ ⎝4 ⎠ [4] Solution : (i) To find Magnitude and Phase Response Given (i) By ZT, y (n) = x (n) + x (n
– 4) Y (z) = x (z) + z –4 x (z = x (z) (1 + z –4) H (z) = 1 + z –4 z = e jw H (e jw) = 1 + e –j4w Put = e − j2 w e j2 w + e − j2 w H (e jw )
= e − j2 w [2 cos (2w )] (i) (ii) (iii) w 0 0.1 π 0.2 π 0.3 π 0.4 π 0.5 π 0.6 π 0.7 π 0.8 π 0.9 π π [ ] Magnitude Response M (w) = | Hr(w) | =
| 2 cos (2w) | Phase Response : φ ( w ) = e − j2 w Phase ... Show more content on Helpwriting.net ...
y (n) = x (n) * h (n) To find Linear convolution using circular convolution, I. Select N=L+M–1=4+3–1=6 II. Append x[n] by (N – L =
2) zeros and h (n) by (N – m = 3) zeros x (n) = { 1, 2, 3, 4, 0, 0 } ∴ h (n) = { 2, 3, 1, 0, 0, 0 } III. Find y(n) using circular convolution N
−1 y( n ) = x ( n ) ⊗ h ( n ) = y(n ) = 5 m =0 ∑ x ( m ) h ( n − m) where N = 6 m =0 ∑ x ( m ) h ( n − m) 5 i) n = 0, y (0) = m=0 ∑ x (
m) h ( − m) 2 y(0) = (1)( 2) + ( 2)(0) + (3)(0) + (4)(0) + (0)(1) + (0)(3) = ii) n = 1, y(1) = y(1) = (1)(3) + ( 2)( 2) + (3)(0) + ( 4)(0) + (0)
+ (0)(1) = iii) n = 2, y(2) = m =0 ∑ x(m) h (1 − m) 7 5 5 y(2) = (1)(1) + ( 2)(3) + (3)( 2) + 0 + 0 + 0 = 13 DSP Help Line : 9987030881
m =0 ∑ x ( m) h ( 2 − m ) www.guideforengineers.com B E EXTC iv) n = 3, y(3) = 5 DTS P DEC– 2004 6 y(3) = 0 + ( 2)(1) + (3)(3)
+ (4)( 2) + 0 + 0 = 19 v) n = 4, y(4) = m =0 ∑ x(m) h (3 − m) 5 y(4) = 0 + 0 + (3)(1) + ( 4)(3) + (0) + (0) = 15 m =0 ∑ x ( m) h ( 4 − m)
5 vi) n = 5, y(5) = = 0 + 0 + 0 + ( 4)(1) + 0 + 0 = m =0 ∑ x(m) h(5 − m) 4 ANS y[n] = { 2 , 7, 13, 19, 15, 4 } ↑
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Q 2. (a) The real sequence of length 8 is given as x[n] = {1, 2, 2, 0, 1, 1, 1 } Find the 8 point DFT X[k], by using 4 point DFTs only.
Prove the property which is used. Solution (a) To find X[k] Given
... Get more on HelpWriting.net ...

63. Characterization And Classification On Ultrasound Signals...
Microstructural characterization and classification on ultrasound signals Using DCT transformation in PCA framework Masoud
Vejdannik a, Ali Sadr b a,b School of Electrical Engineering, Iran University of Science & Technology (IUST), Narmak, Tehran 16844,
Iran a m_vejdannik@yahoo.com, b sadr@iust.ac.ir Abstract Purpose: Method: Results: Conclusions: Introduction Nb–bearing nickel–
based superalloys, like the Inconel 625 alloy studied here, exhibit an outstanding combination of mechanical properties and resistance
to pitting, crevice and intergranular corrosion due to the stiffening effect of chromium, molybdenum and niobium in its nickel matrix.
These properties make precipitation hardening treatments unnecessary [––]. The extraordinary ... Show more content on
Helpwriting.net ...
This segregation and precipitation of the secondary phases can change the mechanical properties of the alloy and decrease its resistance
to corrosion [––]. In addition, the Nb–rich Laves phase has a low melting point that causes an increase in the temperature solidification
range, making the alloy susceptible to solidification cracking [––]. However, an adequate selection of the welding conditions can
minimize the formation of the Nb–rich Laves phases and consequently, reduce its susceptibility to solidification cracking. Therefore, it
is also important to investigate the phase transformation process. Nowadays, researchers are evaluating the use artificial intelligence
techniques to characterize microstructures. For example, Albuquerque, Filho, Cavalcante, and Tavares [––] quantified the porosity of
synthetic materials from optical microscopic images successfully, and the solution proposed, which was based on an artificial neuronal
network (ANN), proved to be more reliable. Albuquerque, de Alexandria, Cortez, and Tavares [––] characterized the microstructures in
images of nodular, grey, and malleable cast irons using a multilayer perceptron
... Get more on HelpWriting.net ...

65. Advantages And Modes Of Effective Devices
modes to generate LP11 modes (LP11a+LP11b) and even all three modes (LP01+LP11a+LP11b)over few–mode fiber (FMF)The
transmission system with mode multiplexing are a very crucial problem. The mode selective devices proposed in divided into two major
categories: free–space based (FSB) and fiber based(FB).Free space components are bulky in size ex liquid–crystal–on–silicon (LCOS)
spatial light modulator (SLM). But fiber based mode selective device have compact and easiness of integration. .Firstly proposed 107–
Gb/s coherent optical OFDM (CO–OFDM) transmission over a 4.5–km two–mode fiber using LP01 and LP11 modes. Secondly
proposed 58.8–Gb/s CO–OFDM transmission using dual modes where the mode separation is achieved via 4× 4 electronic MIMO ...
Show more content on Helpwriting.net ...
Transfer of energy from one ideal mode to another during propagation only due to mode coupling. It has been observed that practically
strong couple modes having equal or nearly equal propagation constant but weakly coupled modes having a highly unequal propagation
constant. The separation between two modes results in modal dispersion increasing capacity through mode division multiplexing
(MDM). SMF ( single–mode fiber helps in the wave movement in two polarization conditions. Polarization–mode dispersion (PMD)
and polarization–dependent loss (PDL) have long been described by field coupling models. It has been observed that strongly coupled
modal group delay or gain depend only no. of modes and variance of accumulated delay or gain and can be derived from the eigenvalue
distributions of certain random variables[7].
SDM (space division multiplexing) has been putforth by Savory. SDM is extremely challenging technology, of requiring developments
in all areas of Photonics Technology. The optical communication systems are being upgraded every day .There is a rapid development
taking place in this field at the global level in the space division multiplexing. Space Division Multiplexing (SDM) is conceptually
simple, SDM is extremely challeng technologically, requiring the development of new fibers, amplifiers, multiplexers, digital signal
processing circuits, and other components. The multiplexing means the utilization of channel by the
... Get more on HelpWriting.net ...

67. The Effect Of Digital Analog Audio Signal Processing
Abstract
As technology advances, the research of digital signal processing is undergoing rapid development. At present, it has been used in many
fields such as communications industry, voice and acoustics applications, radar and image. The processing of the speech signal is one of
the key areas of DSP application. So far, it has formed a number of research directions, such as speech analysis, speech enhancement,
speech recognition, voice communication, etc..
With the development of IT technology and voice processing technology, people have more and more high quality requirements of
audio. However, the traditional analog audio signal processing has been impossible to meet people 's needs, at this time, digital signal
processing began to ... Show more content on Helpwriting.net ...
In this case, this paper designs and implements an audio signal acquisition and processing system which based on DSP technology.
In the processing of the audio signal, it needs to go to the digital filter. Digital filter is a numerical system which used to filter the time
discrete signal. According to the time domain characteristics of unit impulse response function, it can be divided into two kinds of filter,
infinite impulse response (IIR) filter and finite impulse response (FIR) filter. Compared with the IIR filter, the FIR filter has just one
zero point, and has no pole in the z plane except the origin, so it is always stable and can be easily realized. Even more important, the
strict linear phase property can be obtained by the FIR filter, which is difficult to achieve by the IIR filter, so it is widely used in the
field of high fidelity signal processing, such as digital audio, image processing, data transmission, biomedical and other fields.
This project is about using DSP technology and digital filter to build a music instrument which can do sound signal acquisition and
processing. At last, the suggestion and prospect of how to improve the system will be put forward.
Key word: DSP, Audio signal processing, FIR filter
Acknowledgments
I am deeply glad and appreciating my dissertation supervisor Dr. Itagaki for his expert advice and throughout the whole project
A warm thanks
... Get more on HelpWriting.net ...

69. Applications Of Low Power Integrated Intelligent Sensors
Applications of low power integrated intelligent sensors [1–5] has been prolific in recent years, for instance in environmental
observation [8–10], security surveillance [11] and infrastructure communication [12], and biomedical and healthcare monitoring [6, 7].
In particular, as the baby boomers enter retirement, medical cost becomes significant. For example, in 2014, health care accounted for
20% of federal spending in the U.S. []. A major problem in current healthcare systems is that sensing and processing medical data
require significant resources. In order to alleviate this problem, wearable medical devices are expected to provide automatic monitoring
and processing of physiology signals, and more importantly, identifying abnormal signals and contact medical systems for help if
necessary, as shown in Fig. 1. Although such sensors usually have wireless data communication capability through body area network,
due to limited battery power supply, sending raw sensed data is usually not an option. This is because that in a wireless sensor, usually
radio communication power is much higher than signal processing power []. Thus, it is expected that the sensors are capable of
providing preprocessing of raw data based on DSP algorithms and just sending the processed results. Such sensors are called
"intelligent sensors" []. Besides the capability of signal processing and wireless communication, low power, high accuracy, high
reliability, and small footprint are also listed as
... Get more on HelpWriting.net ...

71. Digital Filters And The Digital Filter
2.1.2 Digital Filter
Digital filter is a digital algorithm or device which is composed of a digital multiplier, adder and delay element. The function of the
digital filter is to carry out the operation of the digital code of the input discrete signal in order to achieve the purpose of changing the
spectrum of the signal.
Digital filter has a lot of practical forms, can be roughly divided into two kinds of type: finite impulse response (FIR) and infinite
impulse response (IIR). It can be used in both hardware and software platform. In the hardware implementation method, it is composed
of an adder, a multiplier, which is completely separate from the analog filter which is composed of resistors, inductors and capacitors.
Digital signal ... Show more content on Helpwriting.net ...
Another outstanding advantage of it is that the strict linear phase can be achieved when some symmetry conditions are met. Since linear
phase filter does not change the shape of the input signal, but only make the signal delay in the time domain, so the linear phase
characteristics has very important significance in the engineering practice, such as in data communications, image processing and other
applications. It often require that the signal can not have obvious phase distortion in the transmission and processing, so FIR filter has
been widely used.
The causal finite impulse response filter of length M can be described by the transfer function H(z): (1)
It is a polynomial of and its power is M–1. In time domain, the input and output relationship of the finite impulse response filter is: (2)
y(n) is the output sequence and x(n) is the input sequence.
A direct realization of finite impulse response filter, which can be generated by formula (2). M=5 is shown in Figure 2.2. The transpose,
as shown in Figure 2.3, which is second direct type structure. Typically a finite impulse response filter with a length of M is described
by M coefficients and requires a M multiplier and (M–1) a two–input adder to achieve.
Figure 2.2 Direct finite impulse response filter structure
Figure 2.3 Direct finite impulse response filter structure (transpose)
The linear phase finite impulse response filter with a length of M can be
... Get more on HelpWriting.net ...

73. Applications Of Digital Signal Processing
Applications of Digital Signal Processing in Biomedical field: A Survey
1Ashish Mistry, 2 Ishan Mehta, 3Shantanu Patel, 4Hardik Modi 1,2,3Students, 4Assistant Professor, Charotar University of Science and
Technology, Changa–388421, Gujarat, India
1ashish31093@gmail.com,2 ishanmehta1805@gmail.com, 3shantanoopatel@gmail.com
Abstract:
This paper discusses about the applications digital signal processing in the biomedical field, the recent advancements in the field of
signal processing with new instruments, various techniques and instruments created using signal processing. Also the future
applications and possible advancements in the field of biomedical signal processing have been discussed in the paper. This paper also
discusses the main applications of signal processing in biomedical field that are Diagnosis, Monitoring and Research. A few examples
have been used in the paper to give a better understanding about the idea. The paper includes methods of monitoring heart rate and
creates various devices for measuring it such as the ECG, Brain wave monitoring, monitoring various sound signals and impact on the
human ears and for creation of various devices for the hearing impaired and also about the different signal processing methods used for
tumor detection. Hence, various technological applications of signal processing have been discussed in this paper, the impacts due to the
technological advancements and also the various future applications.
Keywords: Biomedical
... Get more on HelpWriting.net ...

75. Design a Repeater for Digital Rf Signal
Abstract Repeaters for digital TV broadcasting can use either analogue or digital techniques. The purpose of using repeater is to boost
signals into areas of weak coverage in any radio communication system. However wave interference means the repeater usually
requires a frequency shift for analogue modulated signal. For digitally modulated signal it may be possible to use same frequency. This
paper investigated and designed a RF repeater which will improve the inter symbol interference by incorporating delay between
received and transmit signal. This project also reviewed the basics of current Digital Video Broadcasting–Terrestrial (DVB–T)
techniques and selected it as a suitable choice for lab experiment. The practical side of this ... Show more content on Helpwriting.net ...
However, this is not the only way in which television signals are transmitted. Another popular method of transmitting signals digital
video broadcasting–terrestrial (DVB–T). When broadcasters employ this method, the digital signals do not leave the earth. The signals
transmitted using DVB–T do not travel via cable, though; rather, they go from antenna to aerial antenna, from signal blaster to home
receiver. Digital signals are routinely transmitted using terrestrial methods. The transmission method has different names in different
parts of the world. DVB–T is the name used in Europe and Australia. North American customers receive these signals using a set of
standards approved by the Advanced Television Systems Committee (ATSC). In Japan, it is known as Integrated Services Digital
Broadcasting–Terrestrial (IDSB–T). DVB–T broadcasters transmit data using a compressed digital audio–video stream, with the entire
process based on the MPEG–2 standard. These transmissions can include all kinds of digital broadcasting, including HDTV and other
high–intensity methods. This is a vast improvement over the old analog signals, which required separate streams of transmission. Oddly
enough, some DVB–T transmissions take place over analog networks, with the antennas and receivers getting some helpful
technological upgrades along the way. (Pool, 2002) 1.2 Aim of this project The aim of this project is to
... Get more on HelpWriting.net ...