PSTN is the global collection of interconnects originally designed to support circuit switched voice communication.
The PSTN provides traditional Plain Old Telephone Service (POTS), also known as “landline phone” service , to residences & many other establishments.
Parts of the PSTN are also utilized for DSL, voIP & other Internet based network technologies.
Bharat Sanchar Nigam Limited (BSNL) training presentation, Industrial training completed successfully in BSNL,Hardoi. here studied the infrastructure and working of Telecom Industry.
this will help you to understand the technology used in your phones and development from their initial stage. how was the initial look of devices. how it will connect with base station and let you help in better communication, internet connectivity.
Corporate Electric Ltd. is an electrical technology contractor operating locally in the Cayman Islands. we are a repeat service provider for many corporate, commercial, industrial, utility and residential customers in Grand Cayman. We strive to meet exceptional standards of workmanship as well as working strictly in accordance with scheduled programs of work. For further details visit : http://www.corporate-electric.ky/
PSTN is the global collection of interconnects originally designed to support circuit switched voice communication.
The PSTN provides traditional Plain Old Telephone Service (POTS), also known as “landline phone” service , to residences & many other establishments.
Parts of the PSTN are also utilized for DSL, voIP & other Internet based network technologies.
Bharat Sanchar Nigam Limited (BSNL) training presentation, Industrial training completed successfully in BSNL,Hardoi. here studied the infrastructure and working of Telecom Industry.
this will help you to understand the technology used in your phones and development from their initial stage. how was the initial look of devices. how it will connect with base station and let you help in better communication, internet connectivity.
Corporate Electric Ltd. is an electrical technology contractor operating locally in the Cayman Islands. we are a repeat service provider for many corporate, commercial, industrial, utility and residential customers in Grand Cayman. We strive to meet exceptional standards of workmanship as well as working strictly in accordance with scheduled programs of work. For further details visit : http://www.corporate-electric.ky/
Sparse Mat: A Tale of Devising A Low-Cost Directional System for Pedestrian C...Tarik Reza Toha
Pedestrian counting is required in diversified places such as shopping malls, touristic spots, etc., however, a low-cost solution to this problem is yet to be proposed in the literature. Therefore, in this paper, we propose a new solution for pedestrian counting that exploits only a small number of COTS sensors (94% less than that used in the existing Eco-Counter solution). To do so, we propose detail designs and two different algorithms for separately sensing step-down and step-up phenomena that we find while walking. User evaluation of real implementations of both our algorithms confirms an average accuracy of up to 93% through sensing the step-up phenomena.
uReporter, an open public reporting system(SD)Tarik Reza Toha
In day-to-day life, we, the common people, face different types of social problems around us. But most often these issues cannot be reported properly to the proper authorities due to some massive roadblocks between victim and concerned authorities. Security threat, political pressure, lack of knowledge about responsible authorities are the most prevalent obstacles in our country. Also, there exists negligence of related authority like Police, RAB etc. To overcome these roadblocks, we want to build uReporter, a unified online reporting system, which will send the reports as soon as possible to proper authorities after successful completion of several validation steps and reporters' personal information will be hidden. For this purpose, we will build a central repository system to store the reports from common people. Here, people can also share their experiences, supplement the previous reports, compliment about any authority. We will generate periodical reports through mining the valid data and public survey which depicts the real scenario of the society.
Workload-Based Prediction of CPU Temperature and Usage for Small-Scale Distri...Tarik Reza Toha
The recent boost in the usage of high-performance computing systems in small research environments, such as those found at many universities, stipulates the need of smallscale distributed systems. Owning to the rapid growth in both computing power and heat, development of proper thermal and resource management becomes crucial concern of the research community along with the vendors to ensure efficiency for such systems. Moreover, an accurate and relatively fast strategy is needed for adaptation of different sizes of workload in such systems. Therefore, in this paper, we focus on developing simple prediction models of CPU temperature and usage for the systems. We investigate impacts of macro-level parameters such as the number of machines and different sizes of workload on CPU temperature and usage via real experiment. Our experimental results reveal that for a certain size of workload, the variation in CPU temperature and usage is minimal in response to a change in the number of machines, which does not hold in the reverse way. Hence, we develop workload-based prediction models for CPU temperature and usage. We evaluate the accuracy of our models by comparing the values calculated based on these models against the measurements found from real implementation.
an industrial training taken at BSNL CTTC Kolkata covered the whole syllabus of the training (Switching system, SDH, Optical Fibre Cable, GSM, CDMA, ISDN, IN networks, PCM, Broadband DSL Technology, IP fundamentals) Overviews of the total topics all the advantages and Disadvantages.
-Dhrubajyoti Adak(Camellia Institute of Technolgy)
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.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
CW RADAR, FMCW RADAR, FMCW ALTIMETER, AND THEIR PARAMETERSveerababupersonal22
It consists of cw radar and fmcw radar ,range measurement,if amplifier and fmcw altimeterThe CW radar operates using continuous wave transmission, while the FMCW radar employs frequency-modulated continuous wave technology. Range measurement is a crucial aspect of radar systems, providing information about the distance to a target. The IF amplifier plays a key role in signal processing, amplifying intermediate frequency signals for further analysis. The FMCW altimeter utilizes frequency-modulated continuous wave technology to accurately measure altitude above a reference point.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
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1. BACIS OF COMMUNICATION
ANANG ARIS WIDODO - SKI 2
Magister Teknik Elektro - Universitas Brawijaya
MK : TELEKOMUNIKASI-DIGITAL
2. BASIC OF COMMUNICATION
A very simple telecommunication system. The signal is sent over a transmission medium
and,at the receiving end, the transducer again converts the electrical signal into data and
is given to the destination (sink)
Slide 1
MK : TELEKOMUNIKASI-DIGITAL
3. 5 Basic Component
Every communication system has 5 basic requirements
• Data Source (where the data originates)
• Transmitter (device used to transmit data)
• Transmission Medium(cables or non cable)
• Receiver (device used to receive data)
• Destination (where the data will be placed)
Slide 2
MK : TELEKOMUNIKASI-DIGITAL
5. PC-to-PC communication
A communication system used to interconnect two computers The serial ports of two
computers can be connected directly using a copper cable.
However, due to the signal attenuation, the distance cannot be more than 100 meters
MK : TELEKOMUNIKASI-DIGITAL
Slide 4
6. PC-to-PC communication over
telephone network
Two computers can communicate with each other through the telephone
network, using a modem at each end. The modem converts the digital signals
generated by the computer into analog form for transmission over the medium at
the transmitting end and the reverse at the receiving end.
MK : TELEKOMUNIKASI-DIGITAL
Slide 5
7. Generic communication system
In a radio communication system, the electrical signal is transformed into a
high-frequency signal and sent over the air
MK : TELEKOMUNIKASI-DIGITAL
Slide 6
8. ILUSTRATION COMMUNICATION
Kabel logam
Sisi
pengirim
Sisi
penerima
Media udara
Sisi
pengirim
Sisi
penerima
Sisi
pengirim
Sisi
penerima
Kabel optik
MK : TELEKOMUNIKASI-DIGITAL
Slide 7
9. Element Communication
• Multiplexer : Combines the signals from different sources to transmit on the
channel. At the receiving end, a demultiplexer is used to separate the signals
• Multiple access : When two or more users share the same channel, each user has
to transmit his signal only at a specified time or using a specific frequency band.
• Error detection and correction : Detection, and if possible correction, of the errors
has to be done at the receiving end. This is done through a mechanism called
channel coding
• Source Coding : the input signal has to be processed to reduce its bandwidth so
that it can be accommodated on the channel.
• Switching : If a large number of users has to be provided with communication
facilities, as in a telephone network, the users are to be connected based on the
numbers dialed. This is done through a mechanism called switching.
• Signaling : The information sent by the subscriber/switch for call setup,
disconnection, and management, such as billing
MK : TELEKOMUNIKASI-DIGITAL Slide 8
10. TYPES OF COMMUNICATION
• Point-to-point communication
• Point-to-multipoint communication
• Broadcasting
• Simplex communication
• Half-duplex communication
• Full-duplex communication
MK : TELEKOMUNIKASI-DIGITAL
Slide 9
11. TRANSMISSION IMPAIRMENTS
While the electrical signal is traversing over the medium, the signal will be
impaired due to various factors. These transmission impairments can be classified
into three types :
- Atenuasi distorsi
- Delay Distorstion
- Noise
MK : TELEKOMUNIKASI-DIGITAL
Slide 10
14. Thermal noise obtained from the
formula
N0 = kT
where No is noise power density, watts per Hz
Thermal noise for a bandwidth of B Hz is given by
If N is expressed in dB (decibels)
MK : TELEKOMUNIKASI-DIGITAL
Slide 13
15. Intermodulation noise
When two signals of different frequencies are sent through the medium, due to
nonlinearity of the transmitters, frequency components such as f1 + f2 and f1 – f2
are produced, which are unwanted components and need to be filtered out
MK : TELEKOMUNIKASI-DIGITAL
Slide 14
16. Crosstalk
Unwanted coupling between signal paths is known as crosstalk. In the telephone network,
this coupling is quite common. As a result of this, we hear other conversations. Crosstalk
needs to be eliminated by using appropriate design techniques.
MK : TELEKOMUNIKASI-DIGITAL
Slide 15
17. Impulse noise
This is caused by external
electromagnetic disturbances such
as lightning. This noise is
unpredictable. When the signal is
traversing the medium, impulse
noise may cause sudden bursts of
errors. This may cause a temporary
disturbance in voice
communication. For data
communication, appropriate
methods need to be devised
whereby the lost data is
retransmitted.
MK : TELEKOMUNIKASI-DIGITAL
Slide 16
18. ANALOG VERSUS DIGITAL TRANSMISSION
In a digital communication system, 1s and 0s are transmitted as voltage pulses. So,
even if the pulse is distorted due to noise, it is not very difficult to detect the pulses at
the receiving end. Hence, digital communication is much more immune to noise as
compared to analog communication.
MK : TELEKOMUNIKASI-DIGITAL
Slide 17
19. Due to advances in digital electronics, digital systems
have become cheaper, as well. The advantages of digital
systems are:
• More reliable transmission because only discrimination between ones and zeros is
required
• Less costly implementation because of the advances in digital logic chips
• Ease of combining various types of signals (voice, video, etc.).
• Ease of developing secure communication systems
The advantages of digital communication are more reliable transmission, less
costly implementation, ease of multiplexing different types of signals, and secure
communication
MK : TELEKOMUNIKASI-DIGITAL
Slide 18
20. Questions
• What are the advantages of digital communication over analog communication?
• Explain the different types of communication systems.
• What are the different types of transmission impairments?
• What is multiplexing?
• What is multiple access?
• What is signaling?
MK : TELEKOMUNIKASI-DIGITAL
Slide 19
21. References
• G. Kennedy and B. Davis. Electronic Communication Systems. Tata McGraw-Hill
Publishing Company Limited, 1993.
• R. Horak. Communication Systems and Networks. Wiley-Dreamtech India Pvt. Ltd.,
2002.
CP : anangariswidodo@gmail.com
MK : TELEKOMUNIKASI-DIGITAL
Slide 20