What do you mean by communication channel, Electrical Engineering

Assignment Help:

Q. What do you mean by communication channel?

The communication channel (transmissionmedium) is the physicalmediumthat is utilized to send the signal from the transmitter to the receiver. In wireless transmission, such as microwave radio, the transmission medium is usually the atmosphere or free space. Telephone channels, on the other hand, employ a variety of physical media such as wire lines and optical fiber cables. Irrespective of the type of physical medium for signal transmission, the essential feature is that the transmitted signal is corrupted in a random manner by a variety of possible mechanisms. For simplicity, the effects of these phenomena (attenuation, distortion, interference, noise, etc.) are shown at the center of Figure, since the transmission medium is often the most vulnerable part of a communication system, particularly over long distances.

2180_Signals and spectral analysis.png

Attenuation, caused by losses within the system, reduces the size or strength of the signal, whereas distortion is any alteration of the waveshape itself due to energy storage and/or non-linearities. Contamination by extraneous signals causes interference, whereas noise emanates from sources both internal and external to the system. To eliminate any one of these may pose a challenge to the design engineer.


Related Discussions:- What do you mean by communication channel

Electrical fault which might occur in a circuit, Question 1: (a) Descri...

Question 1: (a) Describe the three main types of electrical fault which might occur in a circuit. (b) What is three phase electric power? Give its advantages. (c) Explain th

Find the steady state values, Question: Consider the circuit shown in F...

Question: Consider the circuit shown in Figure. There is no initial energy stored in the circuit until time t=0 when the switch is closed. (i) Transform the given circ

Conveyor, The FESTO conveyer consists of 600mm belt driven by a 24V d.c. mo...

The FESTO conveyer consists of 600mm belt driven by a 24V d.c. motor at a rate of 13 seconds per metre. A relay on the FESTO panel controls the motor operation and is wired for sou

Show the familiar electric sources, Q. Show the familiar electric sources? ...

Q. Show the familiar electric sources? Batteries and ac outlets are the familiar electric sources. These are voltage sources.An ideal voltage source is one whose terminal volta

For the nor and inverter realizations, Q. For the NOR and inverter realizat...

Q. For the NOR and inverter realizations shown in Figure, find the truth table, the type of gate realized, and the expression for the logic output, in each case.

Stack operation, Stack Operation Stack is a group of memory  locations...

Stack Operation Stack is a group of memory  locations which  are part of the  same read write memory  used for  storing  data  temporarily  during the execution of the  progra

History of computers , History of Computers To understand the  inventi...

History of Computers To understand the  invention of microprocessor we have  to see the  history  of computer  first. The growth  the computers  is divided in  different  gener

Impurities in semiconductors, Impurities in Semiconductors Can be a...

Impurities in Semiconductors Can be added in accurately controlled amounts. Can modify the electronic and optical properties. Used to change conductivity over wide ra

generator, diagram of static generator

diagram of static generators

Explain standard set of procedure used in completing a call, Q. Explain Sta...

Q. Explain Standard set of procedure used in Completing a call? Completing a local telephone call between two subscribers linked to the same telephone switch is accomplished th

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd