Method and apparatus for updating precoder coefficients in a data communication transmitter
US6314135A · kind A · utility
28Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1998 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Aug 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03808
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a data communication system having a channel with time-varying impairments and further having a transmitter with a precoder, a method and apparatus for updating the precoder coefficients. The method and apparatus is based on the arrangement of a duplicate precoder and correction filter in the receiver, where the correction filter generates incremental coefficients. The incremental coefficients are sent via a back channel to the transmitter and added to the current values of the precoder coefficients. The method and apparatus provide DFE-like performance and do not have the delay problems associated with DFEs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.