Page 29 - REC :: M.E. CS Curriculum and Syllabus - R2019

Subject Code Subject Name Category L T P C
CU19P25 DIGITAL COMMUNICATION OVER FADING CHANNELS PE 3 0 0 3

Objectives:
 To study and understand the wireless channels
 To learn how to model the fading channels mathematically
 To understand the coherent and non-coherent detections
 To investigate the performance metrics of the digital communication
 To derive the error rates of the wireless communication systems

UNIT-I FADING CHANNEL CHARACTERIZATION AND MODELING 9
System Performance Measures: average SNR, outage probability, average bit error probability, amount of fading,
average outage duration. Main characteristics of fading channels: Slow and fast fading, flat and frequency selective
fading. Multipath modeling using Rayleigh, Nakagami-m, Rice distributions. Log normal Shadowing.
UNIT-II COHERENT AND NON-COHERENT DETECTIONS 9
Ideal Coherent Detection: M-ary Phase-Shift-Keying (M-PSK), Differentially Encoded M-ary Phase-Shift-Keying
(M-PSK), π/4-QPSK, Offset QPSK (OQPSK) or Staggered QPSK (SQPSK), , Minimum-Shift-Keying (MSK) Non-
ideal Coherent Detection, Non-Coherent Detection.
UNIT-III USEFUL EXPRESSIONS FOR EVALUATING ERROR PERFORMANCE 9
Integrals Involving the Gaussian Q-Function: Rayleigh Fading Channel, Nakagami-q (Hoyt), Nakagami-n (Rice)
Integrals Involving the Incomplete Gamma Function: Rayleigh, Nakagami-n (Rice), Nakagami-m, Log-Normal
Shadowing Channel Integrals Involving Other Functions: M-PSK Error Probability Integral, Rayleigh Fading
Channel, Nakagami-m, Arbitrary Two-Dimensional Signal Constellation Error Probability Integral, Higher-Order
Integer Powers of the Gaussian Q-Function. Rayleigh Fading Channel, Nakagami-m Fading Channel.
UNIT-IV PERFORMANCE OF MULTICHANNEL RECEIVERS 9
Diversity Combining: Diversity Concept, Mathematical Modeling, Brief Survey of Diversity Combining Techniques,
Pure Combining Techniques, Hybrid Combining Techniques, Complexity–Performance Tradeoffs.
Maximal-Ratio Combining (MRC): Receiver Structure, PDF-Based Approach, MGF-Based Approach: Average Bit
Error Rate of Binary Signals, Average Symbol Error Rate of Square M-QAM Signals, Bounds and Asymptotic SER
Expressions
UNIT-V ANALYSIS OF SELECTION COMBINING AND SWITCHED DIVERSITY 9
Selection Combining: MGF of Output SNR, Average Output SNR, Outage Probability and Analysis, Average
Probability of Error, BDPSK and Non-Coherent BFSK, Coherent BPSK and BFSK. Switched Diversity: Dual-Branch
Switch-and-Stay Combining (SSC), Performance of SSC over Independent Identically Distributed Branches, Effect of
Branch Unbalance, Effect of Branch Correlation.
Total Contact Hours : 45

Course Outcomes:
On completion of the course, students will be able to
 Model the fading channel mathematically
 Differentiate the coherent and non-coherent detections
 Appreciate the various analytical tools used in the evaluation of wireless systems
 Can derive performance metrics such as outage, error probability and capacity analysis
 Understand the transmission of signals over signal antenna and multiple antennas

Reference Books(s) / Web links:
M.K.Simon, M.-S. Alouini,”Digital Communication over Fading Channels” John Wiley &Sons Inc., 2nd Edition,
1
2000.
2 John Proakis, MasoudSalehi “Digital Communication”, McGraw Hill Education, 5th Edition, 2014.