Non-recursive filter having adjustable step-size for each iterat

Details Non-recursive filter having adjustable step-size for each iterat Non-recursive filter having adjustable step-size for each iterat

1980-07-10

1982-09-14

Malzahn, David H.

Boots, shoes, and leggings

375 16, G06F 1534

Patent

active

043498892

ABSTRACT:
Arrangement having a non-recursive filter and means for weighting a sequence of delayed versions of the input signal in accordance with a sequence of coefficients which are each adjusted iteratively by positive and negative correction steps, respectively, with variable step-sizes, the step-size parameter being selected for each iteration and for each coefficient by means of a run-length detector to which the sign of each correction step is applied and which selects a larger or a smaller step-size parameter depending on the number of correction steps having the same sign and preceding the relevant iteration.
Use: echo canceller, equalizer.

REFERENCES:
patent: 3633105 (1972-04-01), Lender et al.
patent: 3736414 (1973-05-01), McAuliffe
patent: 3930147 (1975-12-01), Bellanger et al.
patent: 3992616 (1976-11-01), Acker
patent: 4032762 (1977-06-01), Caloyannides
patent: 4121295 (1978-10-01), Witt
patent: 4145747 (1979-03-01), Sakaki et al.

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