Adaptive Signal Processing: Applications to Real-World - download pdf or read online

By Jacob Benesty, Yiteng Huang

ISBN-10: 3642055079

ISBN-13: 9783642055072

ISBN-10: 3662110288

ISBN-13: 9783662110287

By adaptive sign processing, we suggest, generally, adaptive ?ltering.In- identified environments the place we have to version, establish, or tune time-varying channels, adaptive ?ltering has been confirmed to be an e?ective and strong device. therefore, this instrument is now in use in lots of di?erent ?elds. because the invention, by way of Widrow and Ho? in 1959, of 1 of the ?rst advert- tive ?lters, the so-called least-mean-square, many purposes seemed to have the capability to take advantage of this primary inspiration. whereas the variety of - plications (using adaptive algorithms) has been (and retains) ?ourishing with time, because of a number of successes, the necessity for extra refined adaptive algorithms grew to become visible as real-world difficulties are extra advanced and extra difficult. even if the speculation of adaptive ?ltering is already a well-established subject in sign processing, new and more suitable thoughts are chanced on each year through researchers. a few of these fresh ways are mentioned during this e-book. The aim of this booklet is to supply, for the ?rst time, a connection with the most well liked real-world purposes the place adaptive ?ltering recommendations play an incredible function. to take action, we invited most sensible researchers in di?erent ?elds to c- tribute chapters addressing their speci?c subject of analysis. millions of pages wouldprobablynotbe enoughto describeallthe practicalapplicationsutil- ing adaptive algorithms. hence, we restricted the themes to a couple very important purposes in acoustics, speech, instant, and networking, the place examine continues to be very energetic and open.

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Extra info for Adaptive Signal Processing: Applications to Real-World Problems

Sample text

M. Kates clamp for the scaled projection algorithm uses the 2-norm of the projection of the adaptive weight vector orthogonal to the look direction. 2 Adaptation with Cost Function Feedback cancellation typically uses LMS adaptation to adjust the FIR filter that models the feedback path. The processing is most conveniently implemented in block form, with the adaptive coefficients updated once for each block of data. 21) n=0 where sn (m) is the microphone output signal and vn (m) is the output of the FIR filter for block m, and there are N samples per block.

The block delay provided by frequency-domain processing using the short-time Fourier transform provides the input-output signal decorrelation needed for the convergence of the feedback cancellation in these systems. 2 Adaptive Feedback Cancellation in Hearing Aids 25 Feedback cancellation in hearing aids reduces the problems associated with acoustic feedback, but adaptive feedback cancellation systems are in turn subject to signal cancellation and coloration artifacts that can occur for a narrowband input signal.

The performance of feedback cancellation is ultimately limited by the characteristics of the room in which the listener is located since the room reflections form part of the feedback path. The chapter concludes with a study of the feedback path in a room along with the measured feedback cancellation performance for an adaptive FIR filter in series with a five-pole nonadaptive filter, and the performance limitations imposed by the room reverberation are discussed. 2 Steady-State Analysis A block diagram for a generic feedback-cancellation system is presented in Fig.

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Adaptive Signal Processing: Applications to Real-World Problems by Jacob Benesty, Yiteng Huang


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