This document provides an introduction to signals and systems from a lecture. It begins by defining a signal as a physical quantity that conveys information and discusses how signals are classified as either continuous or discrete time signals. Continuous time signals are defined at all points in time, while discrete time signals are only defined at discrete time instants. Discrete time signals can be obtained by sampling continuous time signals. The document provides examples of different types of signals and discusses how signals are used in systems to process information and enable applications in fields like communications.
The slides for the equation deviation of recurrent neural network (RNN), back-propagation through time and Sequence-to-sequence (Seq2Seq) models in image/video captioning tasks. Used in group paper reading in University of Sydney.
Write one page essay to explain how you relate signals and systems t.pdfezzi97
Write one page essay to explain how you relate signals and systems theory with current
technology advancement.
Support your argument by providing a case study and identify signals and systems theory plays a
major role on mentioned application.
Please post the website or database you found information. Thank you!
Solution
A signal as referred to in communication systems, signal processing, and electrical engineering is
a function that \"conveys information about the behavior or attributes of some phenomenon. In
the physical world, any quantity exhibiting variation in time or variation in space (such as an
image) is potentially a signal that might provide information on the status of a physical system,
or convey a message between observers, among other possibilities. The IEEE Transactions on
Signal Processing states that the term \"signal\" includes audio, video, speech, image,
communication, geophysical, sonar, radar, medical and musical signals.
Typically, signals are provided by a sensor, and often the original form of a signal is converted to
another form of energy using a transducer. For example, a microphone converts an acoustic
signal to a voltage waveform, and a speaker does the reverse.
The formal study of the information content of signals is the field of information theory. The
information in a signal is usually accompanied by noise. The term noise usually means an
undesirable random disturbance, but is often extended to include unwanted signals conflicting
with the desired signal (such as crosstalk). The prevention of noise is covered in part under the
heading of signal integrity. The separation of desired signals from a background is the field of
signal recovery, one branch of which is estimation theory, a probabilistic approach to
suppressing random disturbances.
Engineering disciplines such as electrical engineering have led the way in the design, study, and
implementation of systems involving transmission, storage, and manipulation of information. In
the latter half of the 20th century, electrical engineering itself separated into several disciplines,
specialising in the design and analysis of systems that manipulate physical signals; electronic
engineering and computer engineering as examples; while design engineering developed to deal
with functional design of man–machine interfaces.
Definitions specific to sub-fields are common. For example, in information theory, a signal is a
codified message, that is, the sequence of states in a communication channel that encodes a
message.
In the context of signal processing, arbitrary binary data streams are not considered as signals,
but only analog and digital signals that are representations of analog physical quantities.
In a communication system, a transmitter encodes a message to a signal, which is carried to a
receiver by the communications channel. For example, the words \"Mary had a little lamb\"
might be the message spoken into a telephone. The telephone transmitter converts th.
P-Wave Onset Point Detection for Seismic Signal Using Bhattacharyya DistanceCSCJournals
In seismology Primary p-wave arrival identification is a fundamental problem for the geologist worldwide. Several numbers of algorithms that deal with p-wave onset detection and identification have already been proposed. Accurate p- wave picking is required for earthquake early warning system and determination of epicenter location etc. In this paper we have proposed a novel algorithm for p-wave detection using Bhattacharyya distance for seismic signals. In our study we have taken 50 numbers of real seismic signals (generated by earthquake) recorded by K-NET (Kyoshin network), Japan. Our results show maximum standard deviation of 1.76 sample from true picks which gives better accuracy with respect to ratio test method.
The main advantage of wavelet transforms are
1. Wavelet transforms has multiresolution properity
2. Better Spectral localization properity
What is Multiresolution properity:
Multiresolution properity means that wavelet transform used different Scales for the analysis of different frequency componants of any signal .
What is scale:
Scale is inversely propertional to the frequency of any signal
large scale is used for the analysis of small frequency componants presents in any signal Whereas Small scale is used for the analysis of high frequency componants of any signal
What is Spectral localisation
Spectral localization properity means that wavelet transform tells us that what frequency componants are present in any given signal and at time axis where these frequency componants are presents
Process of taking Wavelet transform of any signal
The slides for the equation deviation of recurrent neural network (RNN), back-propagation through time and Sequence-to-sequence (Seq2Seq) models in image/video captioning tasks. Used in group paper reading in University of Sydney.
Write one page essay to explain how you relate signals and systems t.pdfezzi97
Write one page essay to explain how you relate signals and systems theory with current
technology advancement.
Support your argument by providing a case study and identify signals and systems theory plays a
major role on mentioned application.
Please post the website or database you found information. Thank you!
Solution
A signal as referred to in communication systems, signal processing, and electrical engineering is
a function that \"conveys information about the behavior or attributes of some phenomenon. In
the physical world, any quantity exhibiting variation in time or variation in space (such as an
image) is potentially a signal that might provide information on the status of a physical system,
or convey a message between observers, among other possibilities. The IEEE Transactions on
Signal Processing states that the term \"signal\" includes audio, video, speech, image,
communication, geophysical, sonar, radar, medical and musical signals.
Typically, signals are provided by a sensor, and often the original form of a signal is converted to
another form of energy using a transducer. For example, a microphone converts an acoustic
signal to a voltage waveform, and a speaker does the reverse.
The formal study of the information content of signals is the field of information theory. The
information in a signal is usually accompanied by noise. The term noise usually means an
undesirable random disturbance, but is often extended to include unwanted signals conflicting
with the desired signal (such as crosstalk). The prevention of noise is covered in part under the
heading of signal integrity. The separation of desired signals from a background is the field of
signal recovery, one branch of which is estimation theory, a probabilistic approach to
suppressing random disturbances.
Engineering disciplines such as electrical engineering have led the way in the design, study, and
implementation of systems involving transmission, storage, and manipulation of information. In
the latter half of the 20th century, electrical engineering itself separated into several disciplines,
specialising in the design and analysis of systems that manipulate physical signals; electronic
engineering and computer engineering as examples; while design engineering developed to deal
with functional design of man–machine interfaces.
Definitions specific to sub-fields are common. For example, in information theory, a signal is a
codified message, that is, the sequence of states in a communication channel that encodes a
message.
In the context of signal processing, arbitrary binary data streams are not considered as signals,
but only analog and digital signals that are representations of analog physical quantities.
In a communication system, a transmitter encodes a message to a signal, which is carried to a
receiver by the communications channel. For example, the words \"Mary had a little lamb\"
might be the message spoken into a telephone. The telephone transmitter converts th.
P-Wave Onset Point Detection for Seismic Signal Using Bhattacharyya DistanceCSCJournals
In seismology Primary p-wave arrival identification is a fundamental problem for the geologist worldwide. Several numbers of algorithms that deal with p-wave onset detection and identification have already been proposed. Accurate p- wave picking is required for earthquake early warning system and determination of epicenter location etc. In this paper we have proposed a novel algorithm for p-wave detection using Bhattacharyya distance for seismic signals. In our study we have taken 50 numbers of real seismic signals (generated by earthquake) recorded by K-NET (Kyoshin network), Japan. Our results show maximum standard deviation of 1.76 sample from true picks which gives better accuracy with respect to ratio test method.
The main advantage of wavelet transforms are
1. Wavelet transforms has multiresolution properity
2. Better Spectral localization properity
What is Multiresolution properity:
Multiresolution properity means that wavelet transform used different Scales for the analysis of different frequency componants of any signal .
What is scale:
Scale is inversely propertional to the frequency of any signal
large scale is used for the analysis of small frequency componants presents in any signal Whereas Small scale is used for the analysis of high frequency componants of any signal
What is Spectral localisation
Spectral localization properity means that wavelet transform tells us that what frequency componants are present in any given signal and at time axis where these frequency componants are presents
Process of taking Wavelet transform of any signal
Data Compression using Multiple Transformation Techniques for Audio Applicati...iosrjce
IOSR Journal of Computer Engineering (IOSR-JCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of computer engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in computer technology. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
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Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Design and Analysis of Algorithms-DP,Backtracking,Graphs,B&B
Lec1
1. Principles of Signals and Systems
Prof. Aditya K. Jagannatham
Department of Electrical Engineering
Indian Institute of Technology, Kanpur
Lecture- 01
Introduction to Signals and Systems, Signal Classification – Continuous and
Discrete Time Signals
Keywords: Introduction to Signals and Systems, Signal Classification,Continuous and
Discrete Time Signals
Hello, welcome to this module in this massive open online course alright. So in this
module we are going to look at signals and systems, the properties of signals and
systems.
(Refer Slide Time: 00:30)
So this course concerns itself with, as the title implies, signals and systems, two of the
fundamental quantities which are relevant in all of electrical, electronics and
communication engineering and relevant in a very profound sense. Their knowledge is
fundamental to understanding the various concepts or aspects of different applications in
electrical electronics and communication engineering.
2. (Refer Slide Time: 01:32)
So what we are interested in this massive open online course is to understand the
fundamental concepts in the properties of signals and systems and more importantly we
are interested in this interplay between signals and systems.
(Refer Slide Time: 02:43)
Now consider the case of a system which I am representing it schematically over here
and if I transmit a signal x(t) through this system, I have an output y(t). Now these are
the signals, x(t) is the input signal and y(t) is the output signal. So we would like to
characterize and better understand what happens when I take a signal, transmit it through
3. a system, what is this interaction, how the system acts upon this signal to generate the
output, because we are going to use systems to process these signals suitably. So we
would like to understand the interplay between signals and some of the impact systems
have on signals and also designing appropriate systems to extract certain behavior from
the signals.
So this interaction between signals and systems is of fundamental importance and these
are used in several branches of electrical engineering, for instance in the design of power
systems where they are monitored and efficiently controlled using the smart grid and you
can have applications in communication systems, such as 3G wireless systems or Wi-Fi
such as a 802.11x systems. So this course aims to look at the properties of both
continuous as well as discrete signals along with systems.
(Refer Slide Time: 06:09)
4. (Refer Slide Time: 08:15)
Let us start with a definition of a signal.
(Refer Slide Time: 09:38)
A signal can be defined as basically, it is a physical quantity that conveys information
about some physical phenomena, for instance such as a voltage signal, an
electromagnetic wave which is a signal that is transmitted over the air from the base
station to the mobile station which is carrying information about the communication
between two individuals or let us say it is a data signal carrying information about either
a video or an image that has been transmitted. So a signal is a bearer of information.
5. (Refer Slide Time: 12:20)
An image can also be thought of as a signal in space and we have signals in both space
and time, for instance a video signal which is 2 dimensional, each frame of the video can
be thought of as an image. So it has variation in space as well as time because it
comprises of a sequence of frames in time.
(Refer Slide Time: 13:48)
Now when we consider time signals we represent them using x(t), y(t) etc., and many
principles that we develop for the analysis of such signals which vary in time in a single
dimension can also be extended for 2D, 3D signals or a separate set of techniques can be
6. developed for them, but based on the fundamental principles that we learn for this time
signal. So in this course we are going to consider the analysis of such simple signals
which are varying with time and these can be suitably extended to other scenarios for
instance images which are 2D space signals or video which is a 3 dimensional both space
and time varying signals.
So a signal represents some physical quantity which conveys information about some
phenomenon that we are interested and naturally to understand more about that
phenomenon, we need to process that signal suitably. So we are going to consider time
varying signals or signals which are functions of time and these are known as time
signals.
(Refer Slide Time: 17:35)
So consider the classification of signals. Signals can be continuous time signals for
instance, ( ) sin(2 )x t t , that is a continuous time signal, it is also known as a sinusoid
or a sinusoidal signal eithercos(2 )t orsin(2 )t both are known as sinusoids. It is defined
continuously over time.
7. (Refer Slide Time: 17:29)
So it is defined continuously at all time instants either from minus infinity to infinity or
over a continuous time interval not at a specific set of time instants.
(Refer Slide Time: 19:23)
Now we have discrete time signals which are defined at discrete set of time instants. For
instance, you have a discrete time signal which can be defined at discrete set of time
instants, this is known as a stem plot and these discrete set of time instants can either be
positive or negative.
8. (Refer Slide Time: 20:27)
So these are only defined at a set of discrete time instants. So it can be identified as a
series or sequence of numbers, for instance we have x(0) at time instant 0, x (1) at time
instant 1, x(2) at time instant 2 and so on.
(Refer Slide Time: 21:33)
So these can be defined as a sequence or series of numbers and so also known as a time
series, for instance if the signal is in time, it is a discrete time signal. So naturally similar
to discrete time signals, you can also have discrete space signals. For instance, if you
take an image signal and if you sample it at appropriate instants in space, this is a
9. discrete space signal. In fact, if you look at modern images which are represented as a
collection of pixels its nothing but a discrete space signal. The discrete time signals can
also be obtained by sampling continuous time signals. So I can go from a continuous
time signal to a discrete time signal and I can obtain a continuous time signal from a
discrete time signal through a suitable filtering operation.
(Refer Slide Time: 24:02)
So a discrete time signal can be obtained can be obtained by suitably sampling a
continuous time signal. There are certain properties of the sampling process. If you take
a continuous time signal and if you sample it at suitable points over a time grid, you get
points that are equal spaced in time, which are the samples.
10. (Refer Slide Time: 25:15)
These are samples and these are the sampling time instants. So by sampling continuous
time signal I am able to obtain a discrete signal. These discrete time signals are more
convenient to process, for instance in a digital communication systems such as most of
our mobile phones are based on such as for instance 3G, 4G, wireless communication
systems, it is convenient to handle digital signals which can be obtained again from
discrete time signals.
So discrete time signals give rise to digital signals and such signals can be processed
much more readily in comparison to the conventional systems which were analog in
nature, for instance the amplitude modulation, FM radio and so on. The examples of
discrete time signals would be the modern communication systems such as 3G, 4G or
your GSM which is a 2G communication system or for instance all your modern
communication systems such as Wi-Fi, etc., even your modern landline probably uses
digital communication systems your set top boxes in TV that is a very good example
which are alternative to your analog cable. So basically that concludes the basic
classification of signals as both continuous and discrete time signals.
11. (Refer Slide Time: 30:10)
(Refer Slide Time: 30:30)
Consider an exponential kind of signal, for instance
1
( )
2
n
x n
for 0n and 0
otherwise. If you can look at this signal, since half is basically less than 1, it is going to
be a decreasing signal. So this is a discrete time signal defined only at discrete time
instants. So basically let us conclude this module with that.
So we have seen signals as physical quantities that convey some information about a
certain phenomenon. We are interested in studying the signals, behavior of these signals,
12. the properties of these signals and we begin with the characterization or classification of
these signals first as two basic classes that is continuous time and discrete time signals.
So we will stop here and continue with other aspects in subsequent modules. Thank you
very much.