Unit - I Analog Communication Introduction to Communication Systems - Modulation - Types - Need for modulation. Theory of amplitude modulation - Evolution and description of SSB techniques - Theory of frequency and phase modulation - Comparison of analog communication systems (AM - FM - PM). (Chapter - 1) Unit - II Pulse and Data Communication Pulse Communication : Pulse Amplitude Modulation (PAM) - Pulse Time Modulation (PTM) - Pulse Code Modulation (PCM) - Comparison of various pulse communication system (PAM - PTM - PCM). Data Communication : History of data communication - Standards organizations for data communication - Data communication circuits - Data communication codes - Data communication hardware - Serial and parallel interfaces. (Chapter - 2) Unit - III Digital Communication Amplitude Shift Keying (ASK) - Frequency Shift Keying (FSK) - Phase Shift Keying (PSK) - BPSK - QPSK - Quadrature Amplitude Modulation (QAM)- 8 QAM-16 QAM - Bandwidth efficiency - Comparison of various digital communication system (ASK - FSK - PSK - QAM). (Chapter - 3) Unit - IV Source and Error Control Coding Entropy, Source encoding theorem, Shannon fano coding, Huffman coding, Mutual information, Channel capacity, Error control coding, Linear block codes, Cyclic codes, ARQ Techniques. (Chapter - 4) Unit - V Multi-user Radio Communication Global System for Mobile communications (GSM) - Code Division Multiple Access (CDMA) - Cellular concept and frequency reuse - Channel assignment and handover Techniques overview of Multiple Access Schemes - Satellite communication - Bluetooth. (Chapter - 5)