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

Dc machine, In the conventional dc machine (with a closed continuous commut...

In the conventional dc machine (with a closed continuous commutator winding on its armature), for example, full-wave rectification of the alternating voltage induced in individual

Describe the process control instructions, Describe the process control ins...

Describe the process control instructions STC - It sets the carry flag & does not affect any other flag  CLC - it resets the carry flag to zero &does not affect any other fl

Evaluate the available received power, (a) Some antennas have a physical ap...

(a) Some antennas have a physical aperture area A that can be identified and is related to the effective area A e by A e = ρ a A, where ρ a is known as the aperture efficiency.

Calculate the rms value, The sinusoidal voltage source in the circuit shown...

The sinusoidal voltage source in the circuit shown in Fig. is developing an rms voltage of 2000 V. The 4 ? load in the circuit is absorbing four times as much average power as the

Variability in oxidation state of transition metals, What do you mean by va...

What do you mean by variability in oxidation state of transition metals different from that of the non transition metals? Illustrate with examples.

Calculate the instantaneous and rms values, Q. The flux-density distributio...

Q. The flux-density distribution in the air gap of a 60-Hz, two-pole, salient-pole machine is sinusoidal, having an amplitude of 0.6 T. Calculate the instantaneous and rms value

Calculate expected peak demand for transformer, What is the expected peak d...

What is the expected peak demand for a transformer feeding the following loads?                           Connected                 kVA

Sensor selection, Submit a brief report on the selection of two commerciall...

Submit a brief report on the selection of two commercially available sensors for the following: • Research and recommend a sensor for a real full size conveyor system of approxima

FLOW CHART TO RUN MOTOR, IFYOU AVE TWO DC MOTOR,RELAY,TWO BATTERYAND MICROC...

IFYOU AVE TWO DC MOTOR,RELAY,TWO BATTERYAND MICROCONTROLLER FLOW CHART TO RUN MOTOR AND CONTROL TWO BATTERIES

Examples of attribute data relevant for a power utility, Examples of attrib...

Examples of attribute data relevant for a power utility: Examples of attribute data relevant for a power utility are given below. •          Consumer data such as categor

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