Adaptive digital filter

Details Adaptive digital filter Adaptive digital filter

2005-02-11

2009-02-17

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C333S018000, C333S02800T, C381S103000, C708S323000

Reexamination Certificate

active

07492817

ABSTRACT:
An adaptive digital filter includes a filtering circuit and a coefficient renewal circuit. The filtering circuit has a coefficient a defined by a fundamental formula: a[n+1]=a[n]+β·e[n]·q[n]/p[n]. β is a number greater than 0 and smaller than 2, e[n] is a difference between the input and the output of the filter, and q[n] and p[n] are formulas. The renewal circuit calculates a renewal value of the coefficient a. The coefficient renewal circuit calculates 2m(m is an integer) greater than p[n] in the fundamental formula, and also calculates the renewal value of the coefficient a in accordance with an execution formula: a[n+1]=a[n]+β·e[n]·q[n]/2min place of the fundamental formula.

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patent: 2007/0285442 (2007-12-01), Higgins
patent: 6-188683 (1994-07-01), None
patent: 3092647 (2000-07-01), None

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