Dual mode LMS channel equalizer
US5111481A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1989 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Nov 17, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03038
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A dual mode LMS channel equalizer is disclosed. The inventive channel equalizer utilizes an LMS algorithm to both identify channel parameters and to smooth the received data signal to mitigate the effects of channel additive noise. In real time operation, the inventive equalizer first identifies the channel parameters in a training period. Thereafter, the same LMS algorithm is switched to smooth the received data signal, while intermittently, the LMS algorithm is switched back to track the slowly changing channel parameters. In comparison with the conventional LMS adaptive channel equalizer, the inventive dual mode channel equalizer achieves a significant performance improvement at little additional cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.