EL4151 Modern Digital Communication Systems Syllabus:
EL4151 Modern Digital Communication Systems Syllabus – Anna University PG Syllabus Regulation 2021
COURSE OBJECTIVES:
To understand the coherent and non coherent receivers and their performance under AWGN channel conditions
To understand the effect of signalling through bandlimited channels and Equalization techniques used to overcome ISI
To understand different channel models, channel capacity and different block coding techniques
To understand the principle of convolutional coding and different decoding techniques
To understand the basics of OFDM as a multicarrier communication and CDMA as a multiuser communication technique.
UNIT I COHERENT AND NON-COHERENT COMMUNICATION
Coherent receivers – Optimum receivers in WGN – IQ modulation & demodulation – QAM modulation and demodulation Noncoherent receivers in random phase channels; MFSK receivers – Rayleigh and Rician channels – Partially coherent receivers – DPSK; M-PSK; MDPSK-BER Performance Analysis. Carrier Synchronization Bit synchronization.
UNIT II EQUALIZATION TECHNIQUES
Band Limited Channels- ISI – Nyquist Criterion- Controlled ISI-Partial Response signals Equalization algorithms– Linear equalizer – Decision feedback equalization – Adaptive Equalization algorithms.
UNIT III BLOCK CODED DIGITAL COMMUNICATION
Architecture and performance – Binary block codes; – Shannon’s channel coding theorem; Channel capacity; Matched filter; Concepts of Spread spectrum communication – Coded BPSK and DPSK demodulators– Linear block codes; Hamming; Golay; Cyclic; BCH ; Reed – Solomon codes. Space time block codes.
UNIT IV CONVOLUTIONAL CODED DIGITAL COMMUNICATION
Representation of codes using Polynomial, State diagram, Tree diagram, and Trellis diagram – Decoding techniques using Maximum likelihood, Viterbi algorithm, Sequential and Threshold methods – Error probability performance for BPSK and Viterbi algorithm, Turbo Coding.
UNIT V MULTICARRIER AND MULTIUSER COMMUNICATIONS
Single Vs multicarrier modulation, orthogonal frequency division multiplexing (OFDM), Modulation and demodulation in an OFDM system, An FFT algorithmic implementation of an OFDM system, Bit and power allocation in multicarrier modulation, Peak-to-average ratio in multicarrier modulation. Introduction to CDMA systems, multiuser detection in CDMA systems – optimum multiuser receiver, suboptimum detectors, successive interference cancellation.
COURSE OUTCOMES:
Upon completion of the course, the students will be able to
CO1: Differentiate coherent and non coherent receivers and analyse their performance under AWGN channel conditions
CO2: Illustrate the effect of signalling through bandlimited channels and Equalization techniques used to overcome ISI
CO3: Determine the channel capacity and design various block coding techniques to combat channel errors
CO4: Construct convolutional coders and analyze the performance of different decoding techniques.
CO5: Describe the basics of OFDM as a multicarrier communication and CDMA as a multiuser communication technique.
TOTAL:45 PERIODS
REFERENCES:
1. John G. Proakis and Masoud Salehi “Digital Communication”, Fifth Edition, Mc Graw Hill Publication, 2014.
2. Simon Haykin, “Digital communication Systems”, John Wiley and sons, 2014.
3. Bernard Sklar and Pabitra Kumar Ray, “Digital Communications Fundamentals & Applications ”, second edition, Pearson Education, 2009.
4. Lathi B P and Zhi Ding, “Modern Digital and Analog communication Systems”, Oxford University Press, 2011.
5. Richard Van Nee & Ramjee Prasad, “OFDM for Multimedia Communications” Artech House Publication, 2001.
6. Theodore S.Rappaport, ‘Wireless Communications”, 2nd edition, Pearson Education, 2002.