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

Change in an organisation, Change in an organisation: Change might ...

Change in an organisation: Change might be perceived in two ways: Change as continuous and intrinsic to an organisation and change as discontinuous & extrinsic. A force

Compute the pull on the plunger, Q. A sectional view of a cylindrical iron-...

Q. A sectional view of a cylindrical iron-clad plunger magnet is shown in figure. The small air gap between the sides of the plunger and the iron shell is uniform and 0.25 mm long.

Electricity and safety, explain appropriate first aid procedure to be follo...

explain appropriate first aid procedure to be followed in case of electric shock

Determine voltage ratio for the circuit, Q. Determine v o /v i for the ci...

Q. Determine v o /v i for the circuit shown in Figure if the op amps are ideal.

Explain the working of leds, Q. Explain the working of LEDs OPTOELECTRO...

Q. Explain the working of LEDs OPTOELECTRONIC devices either produce light or use light in their operation. The first of these, the light-emitting diode (LED), was developed to

Determine the power angle delta, A synchronous motor has the following para...

A synchronous motor has the following parameters per phase. E=2kv, Eo=5kv, X2=3ohms, and I=700amps. Draw the phasor diagram and determine (a) power angle delta, (b) active po

Determine the value of sr flip-flop, The inputs to an SRFF are shown in Fig...

The inputs to an SRFF are shown in Figure. Determine the value of Q at times t 1 , t 2 , and t 3 .

Dc machines, compound generator drawback

compound generator drawback

Explain multimeter, Explain multimeter A multimeter, or universal instr...

Explain multimeter A multimeter, or universal instrument, may be used to measure voltage, current and resistance.

Emi, what is strain gage

what is strain gage

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