Pilot signal detection filter for a wireless communication device
US6122334A · kind A · utility
Inventor
Key dates
| Filing date | Jun 10, 1997 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Jun 10, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/70724
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A novel and improved apparatus for a wireless communication device, which provides fast detection and validation of pilot signals while minimizing the probability of false detection. In the apparatus a searcher subsystem generates a pilot energy sample corresponding to a pilot signal, which is provided to a pilot signal detection filter, comprising two parallel branches. The first branch calculates a weighted historical average of a signal strength of the pilot signal in response to the pilot energy sample, the second branch verifies the pilot energy sample in a state machine, wherein transitions of the state machine are proportional to a magnitude of the pilot energy sample. A pilot detection signal is generated if either the weighted historical average exceeds selected threshold, or a state of the state machine exceeds a maximum value of the states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.