Initialization /prewindowing removal postprocessing for fast RLS filter adaptation
US6643676B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2021/0049
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention, generally speaking, accelerates convergence of a fast RLS adaptation algorithm by, following processing of a burst of data, performing postprocessing to remove the effects of prewindowing, fictitious data initialization, or both. This postprocessing is part of a burst mode adaptation strategy in which data (signals) get processed in chunks (bursts). Such a burst mode processing approach is applicable whenever the continuous adaptation of the filter is not possible (algorithmic complexity too high to run in real time) or not required (optimal filter setting varies only slowly with time). Postprocessing consists of a series of “downdating” operations (as opposed to updating) that in effect advance the beginning point of the data window. The beginning point is advanced beyond fictitious data used for initialization and beyond a prewindowing region. In other variations, downdating is applied to data within a prewindowing region only. The forgetting factor of conventional algorithms can be eliminated entirely. Performance equivalent to that of GWC RLS algorithms is achieved at substantially lower computational cost. In particular, a postprocessing Fast…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.