Adjusting filter coefficients

Details Adjusting filter coefficients Adjusting filter coefficients

1992-03-03

1993-06-01

Malzahn, David H.

Boots, shoes, and leggings

G06F 1531

Patent

active

052166295

ABSTRACT:
The weighting coefficients in the coefficient array (3) of a transversal filter (1) are corrected in accordance with the least mean squares algorithm by adding to each coefficient a correction derived from the product of the content of a stage of the filter shift register (2) and the difference between a signal at the filter output (5) and the output signal of a decision element (15). Each coefficient is corrected only once for each n sample periods of a signal applied to the filter input (7), where n is greater than unity, in order to reduce the amount of computation required during each sample period. Each correction is derived from the output of the filter by inserting n of said differences into the coefficient array as respective weighting coefficients and setting any remaining coefficients to zero.

REFERENCES:
patent: 4038536 (1977-07-01), Feintuch
patent: 4145747 (1979-03-01), Sakaki et al.
patent: 4184129 (1980-01-01), Danjon et al.
patent: 4754419 (1988-06-01), Iwata
patent: 4811360 (1989-03-01), Potter
M. A. Soderstrand et al., "Experimental Performance Data for Slowed-down Adaptive Algorithms", Int. J. Electronics, 1982, vol. 53, No. 1, pp. 95-99.

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