EC2301 DIGITAL COMMUNICATION
AIM
To introduce the basic concepts of Digital Communication in baseband and pass band domains and to give an exposure to error control coding techniques.
OBJECTIVES
To study signal space representation of signals and discuss the process of
sampling, quantization and coding that are fundamental to the digital
transmission of analog signals.
To understand baseband and bandpass signal transmission and reception
techniques.
To learn error control coding which encompasses techniques for the encoding
and decoding of digital data streams for their reliable transmission over noisy
channels.
UNIT I DIGITAL COMMUNICATION SYSTEM
Introduction to Analog Pulse Communication Systems – Digital Communication Systems – Functional description, Channel classification, Performance Measure; Geometric representation of Signals, Bandwidth , Mathematical Models of Communication Channel.
UNIT II BASEBAND FORMATTING TECHNIQUES
Sampling – Impulse sampling, Natural Sampling, Sampler Implementation; Quantisation – Uniform and Non-uniform; Encoding Techniques for Analog Sources- Temporal waveform encoding, Spectral waveform encoding, Model-based encoding, Comparison of speech encoding methods.
UNIT III BASEBAND CODING TECHNIQUES
Error Control Codes - Block Codes , Convolutional Codes, Concept of Error Free Communication; Classification of line codes, desirable characteristics and power spectra of line codes.
UNIT IV BASEBAND RECEPTION TECHNIQUES
Noise in Communication Systems; Receiving Filter – Correlator type, Matched Filter type; Equalising Filter - Signal and system design for ISI elimination, Implementation, Eye Pattern analysis; Synchronisation; Detector – Maximum Likelihood Detector, Error Probability, Figure-of-Merit for Digital Detection.
UNIT V BANDPASS SIGNAL TRANSMISSION AND RECEPTION
Memory less modulation methods - Representation and Spectral characteristics, ASK, PSK, QAM, QPSK, FSK; Bandpass receiving filter, Error performance – Coherent and Non-coherent detection systems.
TEXT BOOKS
1. Amitabha Bhattacharya, “Digital Communications”, Tata McGraw Hill, 2006.
2. Simon Haykin, “Digital Communications”, John Wiley, 2006.
REFERENCES
1. John.G. Proakis, “Fundamentals of Communication Systems”, Pearson Education, 2006.
2. Michael. B. Purrsley, “Introduction to Digital Communication”, Pearson Education, 2006.
3. Bernard Sklar, Digital Communication, 2nd Edition, Paerson Education, 2006
4. Herbert Taub & Donald L Schilling – Principles of Communication Systems ( 3rd Edition ) – Tata McGraw Hill, 2008.
5. Leon W. Couch, Digital and Analog Communication Systems, 6th Edition, Pearson Education, 2001.