About the Book
Signals & SystemsClassification of signals, Complex exponentials as orthogonal functions, Complex exponential fourier series, Fourier transform, Signal spectra, Energy & power density spectrum, Auto & cross correlation functions, Properties of fourier transforms, Fundamental properties of system, System analysis transfer function, Distortionless transmission through system such as ideal filters, group & phase delay.Random Variables Stochastic Processes & Probability TheoryDefinition of probability experiment, Event, Sample space, Point probability statistical independence of events. Joint & conditional probabilities, Discrete & continuous random variable concept, Cumulative distribution & probability density functions, Their properties & interrelation. Standard probability distribution models like Poisson, Rayleigh, Biomial, Gaussian, etc. Central limit theorem random processes, Description, Ensemble average, Stationary & ergodic processes, Complementory error function.Mathematical Representation of NoiseSources of noise, Frequency domain representation of noise, Effect of linear filtering, Spectral & quadrature components of noise, Superposition of noise, Definition of additive white Gaussian noise, characterisation of internally generated noise, - noise bandwidth, Noise temperature, Signal to noise ratio, Noise figure calculations. Performance of linear & angle modulation system on the background of noise.Sampling of Analog Signals & Digital PAM TechniquesSampling theorem in frequency and time domain, Nyquist criterion, Reconstruction using interpolation filters, Ideal, Natural, Flat Samples, Aliasing, Aperture effect, Digital PAM, PAM-TDM, Cross talk, Guard time, Signalling rate.Waveform / Source Coding TechniquesLinear pulse code modulation, Block diagram of transmitter & receiver quantisation noise, Signal to quantisation noise ratio, Companding & nonuniform quantisation predictive coding theory, Delta modulation, Start up & slop overload error, Adaptive delta modulation, Differential PCM, Granular noise.Digital MultiplexingDigital multiplexers, Synchronous, Aschronous & quasisynchronous, Multiplexing hierarchies, Inverse & statistical multiplexing, Calculations of bit rate, PCM data format on line like RZ, NRZ, Bipolar, Unipolar, Manchester, AMI etc. and their spectral features, Frame & bit synchronization, Scramblers & unscramblers, ISI, eye diagram, Equalisation.Digital CW Modulation TechniquesMathematical equations, Signal space representation, Spectral representation & BW requirement constellation diagram, Block schematic to generate & receive for following systems : BPSK, QPSK, OQPSK, Quadratire amplitude modulation, BPSK, M'ary PSK and FSK, Minimum Shift Keying (MSK) & Gaussion MSK.Detection of Binary Signals in Presence of NoiseOptimum & matched filtering, Decision threshold, Coherent detection, Error probability, Calculations for above modulation systems.
