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By Dr.Ranjan Bose, Department of Electrical Engineering, IIT Delhi.
DIGITAL COMMUNICATIONS SYLLABUS :
PULSE DIGITAL MODULATION : Elements of digital communication systems, advantages of digital
communication systems, Elements of PCM: Sampling, Quantization & Coding, Quantization error, Compading
in PCM systems. Differential PCM systems (DPCM).
DELTA MODULATION : Delta modulation, its draw backs, adaptive delta modulation, comparison of PCM and
DM systems, noise in PCM and DM systems.
DIGITAL MODULATION TECHNIQUES : Introduction, ASK, FSK, PSK, DPSK, DEPSK, QPSK, M-ary PSK,
ASK, FSK, similarity of BFSK and BPSK.
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.
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.
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. Principles of Communication Systems – H. Taub and D. Schilling, TMH, 2003
1. Digital and Analog Communication Systems - Sam Shanmugam, John Wiley, 2005.
2. Digital Communications – John Proakis, TMH, 1983. Communication Systems Analog & Digital – Singh &
Sapre, TMH, 2004.
3. Modern Analog and Digital Communication – B.P.Lathi, Oxford reprint, 3rd edition, 2004.