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UNIT - I BASICS OF DIGITAL COMMUNICATION

1.1 Basic signal processing operations in digital communication

1.2 Sampling principles: Sampling theorem, Quadrature sampling of band pass signal, Practical aspects of sampling and signal recovery

UNIT - II WAVEFORM CODING TECHNIQUES - 1

2.1 PAM

2.2 TDM

2.3 Waveform coding techniques, PCM, Quantization noise and SNR, Robust quantization

UNIT - III WAVEFORM CODING TECHNIQUES - 2

3.1 DPCM

3.2 DM, Applications, Baseband shaping for data transmission

3.3 Discrete PAM signals, Power spectra of discrete PAM signals

UNIT - IV BASEBAND BINARY TRANSMISSION

4.1 ISI, Nyquist’s criterion for distortion less baseband binary transmission

4.2 Correlative coding, Eye pattern

4.3 Baseband M-ary PAM systems, Adaptive equalization for data transmission

UNIT - V DIGITAL MODULATION TECHNIQUES

5.1 Digital Modulation formats, Coherent binary modulation techniques, Coherent quadrature modulation techniques, Non-coherent binary modulation techniques

UNIT - VI DETECTION AND ESTIMATION

6.1 Model of DCS

6.2 Gram-Schmidt orthogonalization procedure, Geometric interpretation of signals, Response of bank of correlators to noisy input

UNIT - VII DETECTION OF SIGNALS IN DIFFERENT RECEIVERS

7.1 Detection of known signals in noise, Correlation receiver, Matched filter receiver

7.2 Detection of signals with unknown phase in noise

UNIT - VIII SPREAD SPECTRUM TECHNIQUES

8.1 Spread spectrum modulation:Pseudo noise sequences, Notion of spread spectrum

8.2 Direct sequence spread spectrum, Coherent binary PSK, Frequency hop spread spectrum, Applications