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SYLLABUS

UNIT-I

Source Coding Systems : Introduction, Sampling process, Quantization, Quantization noise, Conditions for optimality of quantizers, Encoding, Pulse-Code Modulation (PCM), Line codes, Differential encoding, Regeneration, Decoding and filtering, Noise considerations in PCM systems, Time-Division Multiplexing (TDM), Synchronization, Delta Modulation (DM), Differential PCM (DPCM), Processing gain, Adaptive DPCM (ADPCM), Comparison of the above systems.

UNIT-II

Baseband Pulse Transmission : Introduction, Matched filter, Properties of matched filter, Matched filter for rectangular pulse, Error rate due to noise, Inter-Symbol interference (ISI), Nyquist’s criterion for distortion less baseband binary transmission, Ideal Nyquist channel, Raised cosine filter and its spectrum, Correlative coding – Duo binary and modified duo binary signaling schemes, Partial response signaling, Baseband M-array PAM transmission, Eye diagrams.

UNIT-III

Signal Space Analysis : Introduction, Geometric representation of signals, Gram-Schmidt orthogonalization procedure, Conversion of the continuous AWGN channel into a vector channel, Coherent detection of signals in noise, Correlation receiver, Equivalence of correlation and matched filter receivers, Probability of error, Signal constellation diagram.

UNIT-IV

Passband Data Transmission : Introduction, Passband transmission model, Coherent phase-shift keyingBinary Phase Shift Keying (BPSK), Quadrature Shift Keying (QPSK), Binary Frequency Shift Keying (BFSK), Error probabilities of BPSK, QPSK, BFSK, Generation and detection of coherent BPSK, QPSK and BFSK, Power spectra of above mentioned modulated signals, M-array PSK, M -array quadrature amplitude modulation (M-array QAM), Non-coherent orthogonal modulation schemes – Differential PSK, Binary FSK, Generation and detection of non-coherent BFSK, DPSK, Comparison of power bandwidth requirements for all above schemes.

UNIT-V

Channel Coding : Error detection and correction – Repetition and parity check codes, Interleaving, Code vectors and Hamming distance, Forward Error Correction (FEC) systems, Automatic Retransmission Query (ARQ) systems, Linear block codes – Matrix representation of block codes, Convolutional codes – Convolutional encoding, Decoding Methods.