Method and apparatus for processing a modulated signal using an equalizer and a rake receiver
US7082174B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2000 |
| Grant date | Jul 25, 2006 |
| Priority date | — |
| Expiry date | Nov 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03777
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a method for achieving higher S/N, one or more signals are received and processed to provide one or more streams of samples. In a first processing scheme, the sample stream(s) are equalized and combined within an equalizer to generate symbol estimates, which may be subsequently processed (e.g., despread and decovered) to provide a first stream of recovered symbols. The sample stream(s) may be equalized prior to being combined. In this case, each sample stream is filtered with a set of coefficients and may be scaled with a scaling factor. The scaled samples for all streams are then combined to generate the symbol estimates. Alternatively, the sample stream(s) may be combined prior to being equalized. In this case, each sample stream is scaled by a scaling factor. The scaled samples for all streams are then combined to generate summed samples that are further filtered with a set of coefficients to generate the symbol estimates. The sample stream(s) may also be processed by a second processing scheme with one or more rake receivers to provide a second stream of recovered symbols. The signal quality for each processing scheme can be estimated and used to select either the first or s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.