# JNTUK R19 3-1 Digital Communications Material PDF Download

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JNTUK R19 3-1 Digital Communications Material PDF Download

Students those who are studying JNTUK R19 ECE Branch, Can Download Unit wise R19 3-1 Digital Communications Material/Notes PDFs below.

### JNTUK R19 3-1 Digital Communications Material PDF Download

OBJECTIVES:

• Understand pulse digital modulation systems such as PCM, DPCM andDM.
• Understand various digital modulation techniques and able to analyze various systems for their performance in terms of probability oferror.
• Study the concepts of information theory and need for sourcecoding.
• Study Block codes, cyclic codes and convolutioncodes.

UNIT-1

PULSE DIGITAL MODULATION: Elements of digital communication systems, advantages of digital communication systems, Elements of PCM: Sampling, Quantization & Coding, Quantization error, Companding in PCM systems. 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-2

DIGITAL MODULATION TECHNIQUES: Introduction, ASK, FSK, PSK, DPSK, DEPSK, QPSK, M-ary PSK, ASK, FSK, similarity of BFSK and BPSK.

UNIT-3

DATA TRANSMISSION : 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-4

INFORMATION THEORY: Discrete messages, concept of amount of information and its properties. Average information, Entropy and its properties. Information rate, Mutual information and its properties.

SOURCE CODING: 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-5

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.

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

TEXT BOOKS:

1. Digital communications – Simon Haykin, John Wiley, 2005
2. Digital and Analog Communication Systems – Sam Shanmugam, John Wiley,2005.

REFERENCE BOOKS:

1. Principles of Communication Systems – H. Taub and D. Schilling, TMH,2003
2. Digital Communications – John Proakis, TMH, 1983. Communication Systems Analog& Digital – Singh & Sapre, TMH, 2004.
3. Modern Digital and Analog Communication Systems –B.P.Lathi, Zhi Ding, Hari Mohan Gupta, Oxford University Press,4th Edition, 2017

OUTCOMES:

1. Analyze the performance of a Digital Communication System for probability of error and are able to design a digital communicationsystem.
2. Analyze various source codingtechniques.
3. Compute and analyze Block codes, cyclic codes and convolutioncodes.
4. Design a coded communicationsystem.