EC2301 DIGITAL COMMUNICATION L T P C
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AIM:
To introduce the basic concepts of Digital Communication in baseband and passband 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 8
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 10
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 9
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 9
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 9
Memory less modulation methods - Representation and Spectral characteristics, ASK, PSK, QAM, QPSK, FSK; Bandpass receiving filter, Error performance - Coherent and Non-coherent detection systems.
TOTAL: 45 PERIODS
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.
Bernard Sklar, Digital Communication, 2nd Edition, Paerson Education, 2006