ANALOG COMMUNICATION

by Atul P. Godse

Different Types of Signals (Continuous, Discrete, Periodic), Time domain and frequency domain representation, Introduction to basic transform techniques applicable to these signals. Spectral Analysis : Fourier technique, Fourier transform and their properties, Transform of gate signal, Impulse function and unit step function, Fourier transform technique for periodic signal, Transform of train of pulses and impulses, Sine and cosine wave. Signal Energy and Power, Spectral density of various types of signals, Spectra (Parseval's theorem), Density spectra of periodic gate and impulse train. Linear Time Invariant (LTI) Systems, Impulse response, Convolution, Convolution with impulse function, Casual and non-casual system, Distortionless system, Impulse response of distortionless system, Ideal filter and practical filter. Modulation Techniques : Need and types of modulation techniques, Amplitude modulation, Frequency spectrum, Power distribution, Modulation by complex signal, Low level and high level AM modulators, Linear integrated circuit AM modulators, Suppressed carrier generation (Balance / Chopper and square law modulation), SSB generator (Phase and frequency discrimination method), VSB transmission and application. Detection of AM signals : Envelope detector circuit, RC time constant, Synchronous detection technique, Error in synchronous detection, SSB signal detection, PLL and its use in demodulation. Angle Modulation : Frequency and phase modulation, Frequency spectrum, Bandwidth requirement, Frequency and phase deviation, Modulation index, NBFM and WBFM, Multiple frequencies FM, FM modulators : Direct (Parameter variation method) and indirect (Armstrong) method of frequency modulation. FM detector : Slope detector, Foster Seely discriminator, Ratio detector and PLL detectors. Radio Transmitters : AM transmitter, Block diagram and working of low level and high level transmitters, Trapezoidal pattern and carrier shift, SSB transmitters, FM transmitters - Frequency multiplication applied to FM signals, FM transmitters. Radio Receivers : Block diagram of radio receiver, Receiver characteristics (Selectivity, Fidelity and sensitivity), AM receiver, RF receiver, Superheterodyne receiver, RF amplifier, Frequency mixer, AVC and AFC, Image signal, Intermediate frequency selection, Diversity reception, FM receiver. Noise : Sources and types of noise and their power density, White noise, Noise from single and multiple noise source for linear systems, Superposition of power spectrum, Equivalent noise bandwidth, Noise figure and equivalent noise temperature, Their relationship, Calculation of noise figure and noise temperature of cascaded systems, Noise performance of communication system, Bandpass noise representation interms of low pass, In-phase and quadrature phase component and their power spectral density, Figure of merit, Calculation for AM, AM-SC and SSB system, Noise in angle modulation system, Figure of merit for FM, Noise density of output of FM detector, Pre-emphasis and de-emphasis, Phasor representation of noise, Capture effect, Comparison of noise performance of AM and FM.

552 pages, Paperback

First published January 1, 2013

Reviews

[Henry Nwaokorobia · Rating 2 out of 5]

This is a very exciting book.I would recommend it to my class