JNTUK R20 3-1 Digital Communications Material PDF Download
Students those who are studying JNTUK R20 ECE Branch, Can Download Unit wise R20 3-1 Digital Communications Material/Notes PDFs below.
JNTUK R20 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.
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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.
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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.
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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.
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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.
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TEXT BOOKS:
- Digital communications – Simon Haykin, John Wiley, 2005
- Digital and Analog Communication Systems – Sam Shanmugam, John Wiley,2005.
REFERENCE BOOKS:
- Principles of Communication Systems – H. Taub and D. Schilling, TMH,2003
- Digital Communications – John Proakis, TMH, 1983. Communication Systems Analog& Digital – Singh & Sapre, TMH, 2004.
- Modern Digital and Analog Communication Systems –B.P.Lathi, Zhi Ding, Hari Mohan Gupta, Oxford University Press,4th Edition, 2017
OUTCOMES:
- Analyze the performance of a Digital Communication System for probability of error and are able to design a digital communicationsystem.
- Analyze various source codingtechniques.
- Compute and analyze Block codes, cyclic codes and convolutioncodes.
- Design a coded communicationsystem.
