Method of reducing coefficient leakage noise introduced to an equalizer during steady state operation
US6163572A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1998 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Apr 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03617
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of reducing leakage noise introduced to an equalizer in a modem during steady state operation. The equalizer includes forward and feedback filters represented by tap coefficients. The tap coefficients of the filters are updated using least mean squares adaptation equations at a symbol rate during steady state operation. The method of the invention includes the steps of: (a) reducing the absolute value of the updated tap coefficients of the filters at a prescribed rate that is less than the symbol rate. Long term convergence stability is improved and leakage noise is reduced by leaking the filter coefficients less frequently than the symbol rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.