Read e-book online Applied Digital Signal Processing: Theory and Practice PDF

By Dimitris G. Manolakis

ISBN-10: 0521110025

ISBN-13: 9780521110020

Grasp the fundamental strategies and methodologies of electronic sign processing with this systematic advent, with no the necessity for an in depth mathematical historical past. The authors lead the reader during the primary mathematical rules underlying the operation of key sign processing recommendations, offering easy arguments and situations instead of targeted basic proofs. assurance of sensible implementation, dialogue of the restrictions of specific equipment and ample MATLAB illustrations let readers to raised attach thought and perform. a spotlight on algorithms which are of theoretical significance or important in real-world functions guarantees that scholars disguise fabric proper to engineering perform, and equips scholars and practitioners alike with the fundamental ideas essential to follow DSP innovations to quite a few purposes. Chapters comprise labored examples, difficulties and machine experiments, aiding scholars to take in the fabric they've got simply learn. Lecture slides for all figures and ideas to the various difficulties can be found to teachers.

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Example text

Clearly, any system which does not satisfy either of these conditions cannot be implemented in practice. 2. We stress that all these properties are properties of systems and not properties of the input signals. Thus, to prove that a system possesses a certain property, we should show that the property holds for every input signal and for all n. However, one counterexample is sufficient to prove that a system does not have a given property. g. 2 Summary of discrete-time system properties. 9 The impulse response of a linear time-invariant system.

Signal representation There are several ways to represent a discrete-time signal. 1 by means of a simple example. 1 also shows a pictorial representation of a sampled signal using index n as well as sampling instances t = nT. We will use one of the two representations as appropriate in a given situation. The duration or length Lx of a discrete-time signal x[n] is the number of samples from the first nonzero sample x[n1 ] to the last nonzero sample x[n2 ], that is Lx = n2 − n1 + 1. The range n1 ≤ n ≤ n2 is denoted by [n1 , n2 ] and it is called the support of the sequence.

Although causality is necessary for the real-time implementation of discrete-time systems, it is not really a problem in off-line applications where the input signal has been already recorded. For any system to be useful, the input and output values should be always finite. In practical terms, this means that the implementation of the system does not lead to overflows. This leads to the concept of stability. ) We now provide a formal definition of stability. 2 A system is said to be stable, in the Bounded-Input Bounded-Output (BIBO) sense, if every bounded input signal results in a bounded output signal, that is |x[n]| ≤ Mx < ∞ ⇒ |y[n]| ≤ My < ∞.

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Applied Digital Signal Processing: Theory and Practice by Dimitris G. Manolakis


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