Communication System1. Unit-1
2. Unit-2
3. Unit-3
4. Unit-4
5. Unit-5
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Communication System SyllabusUNIT I: Signal Analysis Fourier series, Fourier transform, continuous spectrum, Fourier transform of some simple functions, properties of Fourier transform, singularity functions, impulse function, Fourier transform of periodic signals, convolution, sampling theorem, external noise, internal noise, noise calculation, addition of noise due to several sources, noise in reactive circuits, noise figure, signal to noise ratio, noise temp, noise band width. UNIT II: Amplitude Modulation Need of amplitude modulation, Amplitude modulation, power relation. AM wave, generation of AM, balanced modular signal side band technique, suppression of unwanted sideband, side band transmission, demodulation, envelop detector, synchronous detector, noise in amplitude modulation system. UNIT III: Angle Modulation Mathematical equation of frequency modulation (FM), frequency spectrum, phase modulation (PM), relationship between PM and FM, pre-emphasis and de-emphasis, adjacent channel interference, comparison of narrow band and wide band FM, noise in angle modulation system, generation of FM, reactance modulator, frequency division multiplexing. UNIT IV: Transmitter Rectifiers AM transmitter, SSB transmitters, AM receiver, super-heterodyne receiver, automatic gain control, SSB receiver, FM transmitters, FM receivers. UNIT V: Pulse Modulation System Pulse width modulation, pulse position modulation (PPM), pulse code modulation, sampling, Quantization of signals, time division multiplexing. |