Communication engineering and coding theory by sanjay sharma pdf

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Communication Engineering And Coding Theory By Sanjay Sharma Pdf

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Data is one of the most important entities in today's world, thus data reliability is of utmost importance. The data exchanged between computers is sent over various communication channels, which can induce noise in the data thus rendering data unreliable and inconsistent. The number of errors introduced in the data depends on the encoding scheme, the communication channel being used and also the modulation scheme. Various encoding schemes, communication channels and modulation schemes are used for data transmission, each of these schemes have their advantages and disadvantages depending on the scenario. Data is of utmost importance for an effective communication to take place, so the transmission of data should be such that the receiver of the data should receive the data in the same condition as it was sent by the sender [15]. If the data is prone to any disturbance, then the data received by the receiver will not be the same as it ISSN: Vol.

Communication Systems Analog and Digital (English) Author Sanjay Sharma

Thus the goal of data transmission is to transmit the data over a communication channel without any errors. Various techniques have been developed over the past few years to secure and make the data transmission reliable.

One of such techniques is Information Coding Theory. Coding theory the study of codes, including error detecting and error correcting codes, has been studied extensively for the past forty years.

It has become increasingly important with the development of new technologies for data communications and data storage [15]. Coding theory makes use of various codes to encode the data for transmission over a channel and then the data is decoded at the receivers end to get the required data bits. Along with the encoding scheme the modulation scheme being used for data transmission also determines the extent to which the errors are introduced in the data being transmitted.

The performance of modulation schemes vary depending on the encoding scheme used as well as channel.

The reason being importance of data in present scenario. The performance of forward error correction techniques are taken into consideration by using these codes for transmitting data over various communication channels. In [2] authors have compared and analyzed the performance of different forward error correction techniques in case of wireless communication systems.

In [9] authors have analyzed the suitability of Reed Solomon codes for low power communications and found out that Reed Solomon codes reduce the battery consumption but debated the overall suitability due to the extra overhead required to encode the information to be sent.

Reed and Gustave Solomon for reliable data transmission. This code was developed keeping in mind the importance of reliability of data transmission over various communication channels. The block so formed is used for actual transmission over a communication channel. Digital ISSN: ORG communication and storage use the services of RS code for reliable data transmission and data storage.

This code finds its application in space communication, storage media, wireless communication, digital television etc. The message polynomial is formed by multiplying the coefficients of message by appropriate powers of x as follows: The message received at the decoder is given by: The error function E x is given by: Thus RS n, k can be expressed as: The distance of RS code can be calculated as follows: By the use of modulation a message signal, can be conveyed inside another signal which can be physically transmitted.

Noise can change amplitude easier than it can change phase of the signal. Figure 1. Binary phase shift keying. ORG potential bit rate.

The concept behind Quadrature amplitude modulation is to use two carriers, one in phase and other quadrature, with different amplitude levels for each carrier. QAM Modulation[14] 4. More information about this seller Contact this seller 4.

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Communication Systems (Analog And Digital) by Sanjay Sharma - Bookchor

More information about this seller Contact this seller 9. Seller Inventory SK 2. More information about this seller Contact this seller This is Brand New. Seller Inventory Sk Kataria Communication Systems: Analog And Digital is designed for undergraduate students of engineering. The book covers different theories in detail, with many examples, mathematical proofs, and illustrations.

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