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

Partial indicators method, Partial Indicators Method The partial indic...

Partial Indicators Method The partial indicators technique consists of calculating various measures of the financial, operating, commercial, and quality of a business's perfor

Briefly explain about wye-delta transformation, Q. Briefly explain about Wy...

Q. Briefly explain about Wye-delta transformation? Certain network configurations cannot be reduced or simplified by series-parallel combinations alone. In some such cases wye-

What is the purpose of carry flag and zero flag, What is the purpose of car...

What is the purpose of carry (c) flag and zero (z) flag? Carry flag conatins the carry after addition or borrow after subtraction. This carry flag also shows error conditions,

Properties of a semiconductor, Properties of a semiconductor: What pr...

Properties of a semiconductor: What properties of a semiconductor are determined from a Hall effect experiment ? Sol. The Hall Effect experiment is used to determine th

Explain synchronisation and parallel operation, Explain Synchronisation and...

Explain Synchronisation and Parallel Operation Generation, transmission and distribution of electric power have to be conducted in an efficient and reliable way at a reasonable

Explain segment assembler directive, Explain SEGMENT assembler direct...

Explain SEGMENT assembler directive with example. SEGMENT: This directive described to the assembler the start of a segment along with name segment-name. The seg

Determine efficiency and form factor, Q Consider a three-phase, full-wave b...

Q Consider a three-phase, full-wave bridge recti?er, as shown in Figure, with a purely resistive load R. For each diode, determine: (i) efficiency, (ii) form factor, (iii) ripple f

Active filter design, Design a wide band pass filter with cut-off frequency...

Design a wide band pass filter with cut-off frequency f L = 400 kHz, f H = 600 kHz, and a pass-band gain = 10. The roll-off rate at the cut-off frequency should be at least 4

Assembly language instructions, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE

Determine the transfer function in notch network, Q. The twin-tee or notch ...

Q. The twin-tee or notch network shown in Figure is often used to obtain band-reject characteristics. (a) Determine the transfer function V 2 /I 1 . (b) Find the angular freq

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