21EC1501 -ANALOG AND DIGITAL COMMUNICATION
UNIT 1-AMPLITUDE MODULATION 9
Introduction to Communication systems- Amplitude Modulation- - Modulation index, Spectra, Power relations and Bandwidth – AM Generation – Square law and Switching modulator, AM Detection-Envelope Detector. DSBSC Generation – Balanced and Ring Modulator, DSBSC Detection-Coherent Detection and COSTAS loop detector. SSB Generation – Filter, Phase Shift and Third Methods, SSB Detection-Coherent detector. VSB Generation – Filter Method, Super heterodyne Receiver, Noise performance analysis in AM
UNIT II ANGLE MODULATION 9
Phase and frequency modulation, Narrow Band and Wide band FM– Modulation index, Spectra,Power relations and Transmission Bandwidth - FM modulation –Direct and Indirect methods, FMDemodulation – FM to AM conversion, FM Discriminator - PLL as FMDemodulator. Noiseperformance analysis in FM
UNIT III INFORMATION THEORY 9
Discrete Memoryless source, Information, Entropy, Source coding theorem- Shannon- Fano&Huffman codes.Mutual Information.
UNIT IV WAVEFORM CODING 9
Low pass sampling – Aliasing- Signal Reconstruction-Quantization - Uniform & non- uniform quantization - quantization noise - Logarithmic Companding, PCM, DPCM, ADPCM - Delta Modulation and ADM principles-Linear Predictive Coding
UNIT V DIGITAL MODULATION SCHEME 9
Geometric Representation of signals – Functional Block Diagram of Digital Communication system. Generation, detection and BER of Coherent BPSK, QPSK, DPSK, QAM and BFSK - Carrier Synchronization - Structure of Non-coherent Receivers
TOTAL: 45PERIODS