The operation of multichannel feedforward adaptive systems

Author

Minkoff, J.

Author_Institution

AT&T Bell Labs., Whippany, NJ, USA

Volume

45

Issue

12

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

2993

Lastpage

3005

Abstract

A generalized formulation describing the operation of multichannel feedforward adaptive systems is developed that is applicable to random as well as to deterministic signals. Expressions for the optimum multichannel adaptive-filter transfer functions and the resulting minimized cost function are derived. The cost function is a generalized, nondiagonal, quadratic function of the error signal and the expended power. Spectral shaping of the cost function is also considered, which enables varying the emphasis between error and power reduction as a function of frequency. The maximum achievable error-reduction performance of multichannel feedforward adaptive systems is derived. Results of computer experiments are presented, validating all analytical results

Keywords

adaptive filters; adaptive signal processing; economics; error statistics; feedforward; random processes; spectral analysis; telecommunication channels; transfer functions; computer experiments; deterministic signals; error signal; error-reduction performance; expended power; minimized cost function; multichannel feedforward adaptive systems; operation; optimum multichannel adaptive-filter transfer functions; power reduction; quadratic function; random signals; spectral shaping; Adaptive filters; Adaptive systems; Application software; Computer errors; Cost function; Frequency; Sensor systems; Signal processing; Transfer functions; Wiener filter;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.650259

Filename

650259