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US 7,069,286 B2Granted
Solution space principle component-based adaptive filter and method of operation thereof
AssigneeLucent Technologies Inc.
InventorSteven L. Gay
Life of this patent
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Abstract
The present invention provides an adaptive filter. In one embodiment, the adaptive filter includes a solution vector generator that develops a sparse expression of an initial solution vector. In addition, the adaptive filter includes a proportionate normalized least mean squares (PNLMS) analyzer, coupled to the solution vector generator, that employs the sparse expression to converge upon at least one coefficient for the adaptive filter.
Claims19
An adaptive filter, comprising:
- a solution vector generator that develops a sparse expression of an initial solution vector;
- and
- a proportionate normalized least mean squares (PNLMS) analyzer, coupled to said solution vector generator, that employs said sparse expression to converge upon at least one coefficient for said adaptive filter.
A method of converging on at least one filter coefficient, comprising:
- developing a sparse expression of an initial solution vector;
- and
- employing said sparse expression in a proportionate normalized least mean squares (PNLMS) process to converge upon at least one coefficient for said adaptive filter.
An adaptive, echo canceling filter, comprising:
- a solution vector generator that develops a sparse expression of an initial, time-varying solution vector;
- and
- a proportionate normalized least mean squares (PNLMS) analyzer, coupled to said solution vector generator, that employs said sparse expression to converge upon at least one coefficient for said adaptive filter.
Dependencies are inferred from the claim text.