Unit – I Analog Modulation Amplitude Modulation – AM, DSBSC, SSBSC, VSB, PSD, modulators and demodulators – Angle modulation – PM and FM, PSD, modulators and demodulators – Superheterodyne receivers. (Chapter – 1) Unit – II Pulse Modulation Low pass sampling theorem – Quantization – PAM – Line coding – PCM, DPCM, DM and ADPCM and ADM, Channel Vocoder – Time Division Multiplexing, Frequency Division Multiplexing. (Chapter – 2) Unit – III Digital Modulation and Tramsmission Phase shift keying – BPSK, DPSK, QPSK – Principles of M-ary signalling, M ary PSK and QAM, Comparison, ISI – Pulse shaping – Duo binary encoding – Cosine filters – Eye pattern, equalizers. (Chapter – 3) Unit – IV Information Theory and Coding Measure of information – Entropy – Source coding theorem – Shannon – Fano coding, Huffman Coding, LZ coding – Channel capacity – Shannon Hartley law – Shannon’s limit Error control codes – Cyclic codes, Syndrome calculation – Convolution Coding, Sequential and Viterbi decoding. (Chapter – 4) Unit – V Spread Spectrum and Multiple Access PN sequences – properties – m sequence – DSSS – Processing gain, Jamming – FHSS Synchronisation and tracking – Multiple Access – FDMA, TDMA, CDMA. (Chapter – 5)