EC2301 DIGITAL COMMUNICATION lecture notes | for ECE - V semester |
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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.