Subject Syllabus
CI-402 (CSIT) – Analog & Digital Communication (ADC)
CSIT • SEMESTER-4
Rajiv Gandhi Proudyogiki Vishwavidyalaya, Bhopal
Course Modules
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Block diagram of a communication systemSignal-definition, types of signals continuous, discrete, deterministic, non-deterministic, periodic, non-periodic, energy, power, analog and digital signalsElectromagnetic Spectra, Standard signals- DC, sinusoidal, unit step, ramp, signum, rectangular pulse, impulse(delta) signalSystem definition, classification of systems, linear, nonlinear, time variant, time invariant, causal, non causal, stable and unstable systemsFourier transforms: Time domain and frequency domain representation of signal, Fourier Transform and its properties, conditions for existence, Transform of Gate, unit step, constant, impulse, sine and cosine waveShifting property of delta function, convolution, time and frequency convolution theorems
Modulation, need of modulation, types of modulation techniques, amplitude modulation (DSB-FC), modulation index, frequency spectrum of AM wave, linear and over modulation, power relation in AM, transmission efficiency, modulation by a complex signal, bandwidth of AM, AM modulators, square law and switching modulator, advantages and disadvantages of AMDemodulation of AM: Suppressed carrier amplitude modulation systems, DSB-SC, SSB-SC, VSB-SC systems, comparison of various amplitude modulation systemsDemodulation of AM, square law and envelope detector, synchronous detection of AMLow and high power AM transmitters, AM receivers, TRF and superheterodyne receivers, sensitivity, selectivity and fidelity of receivers
Introduction and types of angle modulation, frequency modulation, frequency deviation, modulation index, deviation ratio, bandwidth requirement of FM wave, types of FMPhase modulation, difference between FM and PMDirect and indirect method of FM generationFM demodulators- slope detector, Foster seeley discriminator, ratio detectorIntroduction to pulse modulation systems
Sampling theorem for low pass and Band pass signalPulse amplitude modulation (PAM), Time division, multiplexing (TDM). Channel Bandwidth for PAMTDM signalType of sampling instantaneous, Natural and flat top, Aperture effectIntroduction to pulse position and pulse duration modulationsDigital signal, Quantization, Quantization error, Pulse code modulation, signal to noise ratio, Companding, Data rate and Baud rate, Bit rate, multiplexed PCM signalDifferential PCM (DPCM), Delta Modulation (DM) and Adaptive Delta Modulation (ADM), comparison of various systems
Generation, detection, equation and Bandwidth of amplitude shift keying (ASK) Binary Phase Shift keying (BPSK), Differential phase shift keying (DPSK)Offset and non offset quadrature phase shift keying (QPSK), M-Ary PSKBinary frequency Shift Keying (BFSK), M-Ary FSK Quadrature Amplitude modulation (QAM)