Multi-stage rake combining methods and apparatus
US6801565B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1999 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Jun 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/7117
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Information encoded in a spread spectrum signal transmitted in a communications medium is recovered. A composite signal including a spread spectrum signal is received from the communications medium, and correlated with a spreading sequence to generate time-offset correlations. Respective first and second groups of the correlations are combined, e.g., according to estimated channel coefficients, to produce respective first and second combined values. The first and second combined values are then combined in a manner that compensates for correlated impairment in the composite signal to generate an estimate information in the transmitted spread spectrum signal, e.g., using weighting factors generated from an estimated composite channel response and an estimated impairment correlation, or adaptively generated weighting factors. Related apparatus are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.