Method for determining updated filter coefficients of an adaptive filter adapted by an LMS algorithm with pre-whitening
US8594173B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2009 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Jan 31, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/235
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The application relates to a method for determining at least one updated filter coefficient of an adaptive filter (22) adapted by an LMS algorithm. According to the method, filter coefficients of a first whitening filter (25′) are determined, in particular filter coefficients of an LPC whitening filter. The first whitening filter (25′) generates a filtered signal. A normalization value is determined based on one or more computed values obtained in the course of determining the filter coefficients of the first whitening filter (25′). The normalization value is associated with the energy of the filtered signal. At least one updated filter coefficient of the adaptive filter (22) is determined in dependency on the filtered signal and the normalization value. Preferably, updated filter coefficients for all filter coefficients of the adaptive filter (22) are determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.