Communication Theory- Unit -I - Review of Fourier and Hilbert Transforms - Amplitude Modulation AM, DSBSC, SSBSC - VSB - Spectral analysis of modulated signals Demodulation Square law, envelope detectors Superheterodyne receivers - Unit -II - Angle modulation PM and FM Narrow band, Wideband FM, Spectral analysis of modulated Signal - FM Modulators and FM Demodulators Discriminator, PLL, Stereo FM - Unit -III - Random variables, Central limit Theorem, Random Process, Stationary Processes, Mean, Correlation & Covariance functions- Power Spectral Density, Ergodic Processes, Gaussian Process - Unit -IV - Noise sources and types Noise figure and noise temperature Noise in cascaded systems. Narrow band noise PSD of in phase and quadrature noise Noise performance in AM systems - Noise performance in FM systems Pre-emphasis and de-emphasis Capture effect, threshold effect - Unit - V - Quantization ,Uniform and non-uniform quantization ,Quantization noise, Companding laws of speech signals , PCM, PCM, DPCM,ADPCM, DM, ADM -

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