Title :
The operation of multichannel feedforward adaptive systems
Author_Institution :
AT&T Bell Labs., Whippany, NJ, USA
fDate :
12/1/1997 12:00:00 AM
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;
Journal_Title :
Signal Processing, IEEE Transactions on
