Apparatus and method for hybrid traffic and pilot signal quality determination of finger lock status of rake receiver correlators
US7403557B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2004 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | May 18, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70701
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Provided are improved systems and methods for spread spectrum communication employing hybrid Eb/No and pilot-based finger lock determination for RAKE receivers. Finger lock thresholds are periodically set using an extended time-averaged Eb/No traffic signal estimate for each finger mapped to an Ec/No pilot level, where the extended time-averaged Eb/No estimate is inversely proportional to the mapped Ec/No level, thus, decreasing the required Ec/No level when the Eb/No estimate increases and increasing the required Ec/No level when the Eb/No estimate decreases. Existing pilot-based finger lock algorithms may be used with the Ec/No threshold set using the extended time-averaged Eb/No estimate. When pilot signals are weak but traffic signals remain strong, fingers will remain locked to increase the combiner output signal-to-noise ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.