Download Advanced digital signal processing and noise reduction by Saeed V. Vaseghi PDF

By Saeed V. Vaseghi

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ISBN-13: 0470740167978

ISBN-10: 0470740159

ISBN-13: 9780470740156

ISBN-10: 0470740167

ISBN-13: 9780470740163

ISBN-10: 0470754060

ISBN-13: 9780470754061

Electronic sign processing performs a imperative function within the improvement of contemporary verbal exchange and data processing structures. the speculation and alertness of sign processing is worried with the identity, modelling and utilisation of styles and constructions in a sign technique. The commentary indications are frequently distorted, incomplete and noisy and accordingly noise relief, the elimination of channel distortion, and alternative of misplaced samples are vital elements of a sign processing process.

The fourth version of complex electronic sign Processing and Noise aid updates and extends the chapters within the prior version and contains new chapters on MIMO platforms, Correlation and Eigen research and self reliant part research. the wide variety of issues lined during this publication comprise Wiener filters, echo cancellation, channel equalisation, spectral estimation, detection and removing of impulsive and temporary noise, interpolation of lacking facts segments, speech enhancement and noise/interference in cellular communique environments. This booklet presents a coherent and dependent presentation of the idea and purposes of statistical sign processing and noise aid equipment.

  • new chapters on MIMO structures, correlation and Eigen research and self reliant part research

  • accomplished assurance of complicated electronic sign processing and noise aid tools for conversation and knowledge processing platforms

  • Examples and purposes in sign and knowledge extraction from noisy info

  • Comprehensive yet obtainable insurance of sign processing conception together with likelihood types, Bayesian inference, hidden Markov versions, adaptive filters and Linear prediction versions

complicated electronic sign Processing and Noise aid is a useful textual content for postgraduates, senior undergraduates and researchers within the fields of electronic sign processing, telecommunications and statistical facts research. it is going to even be of curiosity to specialist engineers in telecommunications and audio and sign processing industries and community planners and implementers in cellular and instant verbal exchange groups.

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4 Neural Networks Neural networks are combinations of relatively simple non-linear adaptive processing units, arranged to have a structural resemblance to the transmission and processing of signals in biological neurons. In a neural network several layers of parallel processing elements are interconnected with a hierarchically structured connection network. The connection weights are trained to ‘memorise patterns’ and perform a signal processing function such as prediction or classification. Neural networks are particularly useful in non-linear partitioning of a signal space, in feature extraction and pattern recognition, and in decision-making systems.

28 2 Illustration of the uniform probability distribution of the quantization noise. 8 Non-Linear Quantisation, Companding A uniform quantiser is only optimal, in the sense of achieving the minimum mean squared error, when the input signal is uniformly distributed within the full range of the quantiser, so that the uniform probability distribution of the signal sample values and the uniform distribution of the quantiser levels are matched and hence different quantisation levels are used with equal probability.

W1 W2 ^ X(0) ^ X(1) ^ X(2) . . Y(N-1) WN -1 ^ X(N-1) Inverse Discrete Fourier Transform Restored signal ^ x(0) ^ x(1) ^ x(2) . . 9 A frequency–domain Wiener filter for reducing additive noise. proportion to the signal-to-noise ratio at that frequency. The Wiener filter bank coefficients, derived in Chapter 6, are calculated from estimates of the power spectra of the signal and the noise processes. 6 Blind Channel Equalisation Channel equalisation is the recovery of a signal distorted in transmission through a communication channel with a non-flat magnitude and/or a non-linear phase response.

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Advanced digital signal processing and noise reduction by Saeed V. Vaseghi


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