Matched-filter obtained side information for spread-spectrum data detection
US6714583B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 2002 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Jun 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/7093
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improvement to a spread-spectrum receiver having a matched filter. A symbol sampler samples at the symbol time TS, a symbol sample from the matched filter. A noise sampler samples at a plurality of chip times kTC, but not at the symbol time TS, a plurality of noise samples from the matched filter. An estimator or low-pass filter estimates the plurality of noise samples from the symbol sampler, to generate a noise estimate. A combiner subtracts the noise estimate from the symbol sample, thereby generating a comparison signal. A magnitude device determines a magnitude of the comparison signal. A comparator compares the magnitude of the comparison signal to the threshold voltage, thereby generating the erasure signal. An erasure decoder erasure decodes the input data using the erasure signals from the erasure detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.