Spread-spectrum data detection using matched-filter obtained side information
US6366605B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1999 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Mar 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/7093
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improvement to a spread-spectrum receiver at a bse station 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 filters the plurality of noise samples from the symbol sampler, to generate a noise estimate. A combiner circuit subtracts the noise estimate from the low-pass filter from the symbol sample from the symbol sampler, thereby generating a comparison signal. A magnitude device determines a magnitude of the comparison signal. A comparator has threshold voltage applied to a threshold input. The 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.