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

Induction motor, principle and operation of 3phace induction motor

principle and operation of 3phace induction motor

Resistance of 1200 m of copper cable, Verify the resistance of 1200 m of co...

Verify the resistance of 1200 m of copper cable having a diameter of 12 mm if the resistivity of copper is 1.7 x 10-8 Ωm

Digital control system, a digital computer controlled rolling mill regulato...

a digital computer controlled rolling mill regulator system..

Explain workinf of colpitts oscillator, Q. Explain workinf of colpitts osci...

Q. Explain workinf of colpitts oscillator? When the collector supply voltage V cc is switched on, the capacitors C1 and Cz are charged. These capacitors C1 and Cz discharge thr

Op-amp amplifier, A voltage signal generated by a sensor conditioning circu...

A voltage signal generated by a sensor conditioning circuit varies from -0.5V to +0.5V . The signal from the sensor is to be connected to the analog to digital  converter which onl

Explain effect of frequency of applied electric field, Explain effect of fr...

Explain effect of frequency of applied electric field. If an external electric field is applied, the distance among charges that is related to chemical bonding keeps constant i

Determine the circuit of three transistors dynamic ram cell, a. Determine t...

a. Determine the circuit of three transistors dynamic RAM cell and define briefly read and write functions. b. Write short note on factors influencing choice of layer for wiring

Potentiometer, explain the details of varnier type potentiometer

explain the details of varnier type potentiometer

Project, really need help how to run the veener press line for wood-based p...

really need help how to run the veener press line for wood-based panels?

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