Communication Theory

Communication Theory

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Amplitude ModulationsGeneration and demodulation of AM, DSB-SC, SSB-SC, VSB signals, Filtering of sidebands, Comparison of amplitude modulation systems, Frequency translation, Frequency division multiplexing, AM transmitters Superhetetrodyne receiver, AM receiver.Angle ModulationAngle modulation, Frequency modulation, Narrowband and wideband FM, Transmission bandwidth of FM signals, Generation of FM signal Direct FM Indirect FM, Demodulation of FM signals, FM stereo multiplexing, PLL Nonlinear model and linear model of PLL, Non-linear effects in FM systems, FM broadcast receivers, FM stereo receivers.Noise Performance of DSB, SSB ReceiversNoise Shot noise, Thermal noise, White noise, Noise equivalent bandwidth, Narrowband noise, Representation of narrowband noise in terms of envelope and phase components, Sinewave plus Narrowband noise, Receiver model, Noise in DSB-SC receiver, Noise in SSB receiverNoise Performance of AM and FM ReceiversNoise in AM receivers threshold effect, Noise in FM receivers capture effect, FM threshold effect, FM threshold reduction, Pre-emphasis and de-emphasis in FM, Comparison of performance of AM and FM systems.Information TheoryUncertainty, Information and entropy, Source coding theorem, Data compaction, Discrete memory less channels, Mutual information, Channel capacity, Channel coding theorem, Differential entropy, and mutual information for continuous ensembles, Information capacity theorem, Implication of the information capacity theorem, Rate distortion theory, Compression of information.2.2.3 WBFM Generation using Indirect Method (Armstrong Method) Basic Principle : Narrowband FM (NBFM) signal is generated using phase modulation ... Draw the circuit diagram of FET reactance modulator and explain its operation. 2.

Title:Communication Theory
Publisher:Technical Publications - 2007-01-01


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