Description:
Signal AnalysisAnalogy between vectors and signals, Orthogonal signal space, Signal approximation using orthogonal functions, Mean square error, Closed or complete set of orthogonal functions, Orthogonality in complex functions, Exponential and sinusoidal signals, Concepts of Impulse function, Unit step function, Signum function.Fourier Series Representation of Periodic SignalsRepresentation of Fourier series, Continuous time periodic signals, Properties of Fourier series, Dirichlet's conditions, Trigonometric Fourier series and Exponential Fourier series, Complex Fourier spectrum.Fourier TransformsDeriving Fourier transform from Fourier series, Fourier transform of arbitrary signal, Fourier transform of standard signals, Fourier transform of periodic signals, Properties of Fourier transforms, Fourier transforms involving impulse function and Signum function. Introduction to Hilbert transform.Signal Transmission Through Linear SystemsLinear system, Impulse response, Response of a linear system, Linear time invariant (LTI) system, Linear time variant (LTV) system, Transfer function of a LTI system. Filter characteristics of linear systems. Distortionless transmission through a system, Signal bandwidth, System bandwidth, Ideal LPF, HPF and BPF characteristics, Causality and PaleyWiener criterion for physical realization, Relationship between bandwidth and rise time.Convolution and Correlation of SignalsConcept of convolution in time domain and frequency domain, Graphical representation of convolution, Convolution property of Fourier transforms. Cross correlation and auto correlation of functions, Properties of correlation function, Energy density spectrum, Parseval's theorem, Power density spectrum, Relation between auto correlation function and energy/power spectral density function. Relation between convolution and correlation, Detection of periodic signals in the presence of noise by correlation, Extraction of signal from noise by filtering.SamplingSampling theoremGraphical and analytical proof for band limited signals, Impulse sampling, Natural and flat top sampling, Reconstruction of signal from its samples, Effect of under samplingAliasing, Introduction to band pass sampling.Laplace TransformsReview of Laplace transforms, Partial fraction expansion, Inverse Laplace transform, Concept of region of convergence (ROC) for Laplace transforms, Constraints on ROC to various classes of signals, Properties of L.T's relation between L.T's and F.T of a signal. Laplace transform of certain signals using waveform synthesis.zTransformsFundamental difference between continuous and discrete time signals, Discrete time signal representation using complex exponential and sinusoidal components, Periodicity of discrete time using complex exponential signal, Concept of zTransform of a discrete sequence. Distinction between Laplace, Fourier and zTransforms. Region of convergence in ztransform, Constraints on ROC for various classes of signals, Inverse ztransform, Properties of ztransforms. more >>
