# Digital Communications

Course Code:RT32042

Author:uLektz

University:

Regulation:2013

Categories:Electronics & Communication

Format : ePUB3 (DRM Protected)

Type :eBook

Rs.199 Rs.30 Rs.85% off

Description :Digital Communications of RT32042 covers the latest syllabus prescribed by JNTU Kakinada for regulation 2013. Author: uLektz, Published by uLektz Learning Solutions Private Limited.

Note : No printed book. Only ebook. Access eBook using uLektz apps for Android, iOS and Windows Desktop PC.

##### Topics
###### UNIT I PULSE DIGITAL MODULATION

1.1 Elements of digital communication systems, advantages of digital communication systems

1.2 Elements of PCM: Sampling, Quantization & Coding, Quantization error, Companding in PCM systems

1.3 Differential PCM systems (DPCM), Delta modulation, its draw backs, adaptive delta modulation, comparison of PCM and DM systems, noise in PCM and DM systems

###### UNIT II DIGITAL MODULATION TECHNIQUES

2.1 Introduction, ASK, FSK, PSK, DPSK, DEPSK, QPSK

2.2 M-ary PSK, ASK, FSK, similarity of BFSK and BPSK

###### UNIT III DATA TRANSMISSION

3.1 Base band signal receiver, probability of error, the optimum filter, matched filter, probability of error using matched filter, coherent reception, non-coherent detection of FSK, calculation of error probability of ASK, BPSK, BFSK,QPSK.

###### UNIT IV INFORMATION THEORY

4.1 Discrete messages, concept of amount of information and its properties, Average information, Entropy and its properties.

4.2 Information rate, Mutual information and its properties

###### UNIT V SOURCE CODING

5.1 Introductions, Advantages, Shannon’s theorem, Shanon-Fano coding, Huffman coding, efficiency calculations, channel capacity of discrete and analog Channels, capacity of a Gaussian channel, bandwidth –S/N trade off

###### UNIT VI LINEAR BLOCK CODES AND CONVOLUTION CODES

6.1 LINEAR BLOCK CODES: Introduction, Matrix description of Linear Block codes, Error detection and error correction capabilities of Linear block codes, Hamming codes, Binary cyclic codes, Algebraic structure, encoding, syndrome calculation, BCH Codes

6.2 CONVOLUTION CODES: Introduction, encoding of convolution codes, time domain approach, transform domain approach. Graphical approach: state, tree and trellis diagram decoding using Viterbi algorithm.