Digital communication systems, Electrical Engineering

Assignment Help:

Q. Digital communication systems?

Today digital communication systems are in common use, carrying the bulk of our daily information transmission through a variety of communication media, such as wire-line telephone channels, microwave radio, fiber-optic channels, and satellite channels. Even the current analog AMand FMradio and television broadcasts will be replaced in the near future by digital transmission systems. High-speed integrated circuits (ICs), programmable digital signal processing chips, microelectronic IC fabrication, and sophisticated digital modulation techniques have certainly helped digital communications as a means of transmitting information.

In spite of the general trend toward digital transmission of analog signals, a significant amount of analog signal transmission still takes place, especially in audio and video broadcasting. Historically, analog communication systems were placed first, and then came digital communication systems.

In any communication system, the communication channel provides the connection between the transmitter and the receiver. The physical channel (medium) may be any of the following:

• A pair of wires, which carry the electric signal

• Optical fiber, which carries the information on a modulated light beam

• An underwater ocean channel, in which the information is transmitted acoustically

• Free space, over which the information-bearing signal is radiated by using an antenna

• Data storage media, such as magnetic tape, magnetic disks, and optical disks.

The available channel bandwidth, as well as the noise and interference, limit the amount of data that can be transmitted reliably over any communication channel.


Related Discussions:- Digital communication systems

What are the currents in the high-voltage, Q. A transformer is rated 10 kVA...

Q. A transformer is rated 10 kVA, 220:110 V (rms). Consider it an ideal transformer. (a) Compute the turns ratio and the winding current ratings. (b) If a 2-load resistance

Desirable requirements of a generic photo-detector, Question : a) Stat...

Question : a) State six desirable requirements of a generic photo-detector. b) A gallium arsenide pin photo-diode has an intrinsic layer of width 1 μm. The diode is revers

Singular value decomposition, Singular Value Decomposition (i) initial...

Singular Value Decomposition (i) initialize a 2x2 matrix m=[4 0.5;0.5 7]  Factorize the matrix with SVD [u d v]=svd(m) How the matrix u and v differ? Why is that?

BASIC ELECTRICLE, kindly tell me which text book is usefull forlearn the ba...

kindly tell me which text book is usefull forlearn the basic electricle.

Define causal system - discrete time systems, Define Causal System - Discre...

Define Causal System - Discrete Time Systems? A causal system is one which produces an output only when there is an input. All physical systems are causal. In general, a causal

What do you mean by addressing and numbering, Q. What do you mean by addres...

Q. What do you mean by addressing and numbering? Numbering and Addressing: In data and telephone networks, end equipment are more often single units than multiple devices uni

Managing change, Managing Change: 1 The prominent actors included in t...

Managing Change: 1 The prominent actors included in the change procedure in an organisation are Change Makers, Change Agents, Change Leaders and they play a strategic role in

Measurement, explain a basic measurement system

explain a basic measurement system

Evaluate apparent depth of a needle, Q. A tank is filled with water to a he...

Q. A tank is filled with water to a height of 12.5cm.The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.4cm.What is the refractive i

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