6EE6.3 DIGITAL COMMUNICATION AND INFORMATION THEORY

Unit-1

PCM & DELTA Modulation Systems:

PCM and delta modulation, quantization noise in

PCM and delta modulation. Signal-to-noise ratio in PCM and delta modulation, T1 Carrier

System, Comparison of PCM and DM. Adaptive delta Modulation. Bit, word and frame

synchronization, Matched filter detection.

Unit-2

Digital Modulation Techniques:

Various techniques of phase shift, amplitude shift and

frequency shift keying. Minimum shift keying. Modulation & Demodulation.

Unit-3

Error Probability in Digital Modulation:

Calculation of error probabilities for PSK, ASK,

FSK & MSK techniques.

Unit-4

Information Theory:

Amount of Information, Average Information, Entropy, Information

rate, Increase in Average information per bit by coding, Shannon's Theorem and Shannon's

bound, Capacity of a Gaussian Channel, BW-S/N trade off, Orthogonal signal transmission.

Unit-5

Coding:

Coding of Information, Hamming code, Single Parity-Bit Code, Linear Block code,

cyclic code & convolutional code.