Adaptive filter

Details Adaptive filter Adaptive filter

1986-10-10

1988-05-24

Harkcom, Gary V.

Boots, shoes, and leggings

333 18, 375 14, G06F 738, H03H 2100

Patent

active

047470682

ABSTRACT:
In an adaptive filter a plurality of outputs (5, 7, 9, 11) of a delay circuit (3) are coupled via coefficient control circuits (21, 23, 25, 27) to a plurality of inputs (91, 93, 95, 97) of an adder circuit (89). The control signal inputs (29, 31, 33, 35) of the coefficient control circuits each receive a control signal via first integrators (37, 39, 41, 43) from first multiplier circuits (53, 55, 57, 59). A further output (85) of the delay circuit (3) controls a further input (87) of the adder circuit (89). The output signal from the adder circuit is controlled by a control circuit (121) which receives a control signal from a second multiplier circuit (103) via a second integrator (109) and a circuit having an exponential transfer function (113). A convergence behavior of the adaptive filter which is virtually independent of signal amplitudes is obtained by driving the integrators in such a way that the amplitude of their input signals are substantially independent of the amplitude of the signal at the input (1) of the filter (FIG. 1).

REFERENCES:
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patent: 3736414 (1973-05-01), McAuliffe
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patent: 4184129 (1980-01-01), Macchi nee Danjon et al.
patent: 4290139 (1981-09-01), Walsh
patent: 4322811 (1982-03-01), Voorman
patent: 4333158 (1982-06-01), Voorman
patent: 4695969 (1987-09-01), Sollenberger

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