Adaptive line enhancer

Details Adaptive line enhancer Adaptive line enhancer

1978-03-20

1980-12-09

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Time domain filters

307221D, 333165, 333174, G11C 2700, H03H 1502, H03H 701

Patent

active

042387469

ABSTRACT:
An input signal X(j) is fed directly to the positive port of a summing function and is simultaneously fed through a parallel channel in which it is delayed, and passed through an adaptive linear transversal filter, the output being then subtracted from the instantaneous input signal X(j). The difference, X(j)-Y(j), between these two signals is the error signal .epsilon.(j). .epsilon.(j) is multiplied by a gain .mu. and fed back to the adaptive filter to readjust the weights of the filter. The weights of the filter are readjusted until .epsilon.(j) is minimized according to the recursive algorithm: ##EQU1## where the arrow above a term indicates that the term is a signal vector. Thus, when the means square error is minimized, W.sub.(j+1) =W.sub.(j), and the filter is stabilized.

REFERENCES:
patent: 3732410 (1973-05-01), Mackechnie
patent: 4064397 (1977-12-01), Sakaki et al.
patent: 4100513 (1978-07-01), Weckler
Widrow et al.--Adaptive Noise Cancelling; Principles and Applications, "In roc. of the IEEE, vol. 63, No. 12, Dec. 1975;" Title Page & pp. 1692-1716.

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