METHOD AND APPARATUS FOR HIERARCHICAL ADAPTIVE FILTER
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United States of America Patent
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Issued Date -
Nov 21, 2013
app pub date -
Feb 3, 2011
filing date -
Feb 3, 2011
priority date (Note) -
Abandoned
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Abstract
A method and apparatus for filtering a reference signal by a series of taps having coefficients, comprising dividing the taps into at least one layer of a plurality of groups, each group comprising a plurality of taps, as a first layer, forming a plurality of coefficients arranged in at least one group, as at least one subsequent layer and forwarding multiply-accumulate results of each group in each layer sequentially to the at least one group in the at least one subsequent layer to generate an output signal, and adjusting the coefficients based on an error signal formed as a difference between the output signal and a received input signal related to the reference signal and an interim error signal as a difference between the input signal and a summation of the multiply-accumulate results of at least one layer.
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