Method and apparatus for tracking signals in a wireless communication system
US7068707B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2001 |
| Grant date | Jun 27, 2006 |
| Priority date | — |
| Expiry date | Dec 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for tracking signals in a wireless communication system. In one embodiment, a base station includes a rake antenna having multiple fingers. When any of the fingers goes out of lock, the base station waits a predetermined time period and then adjusts the lock detect filter. The adjustment is based on comparison of received signal energy to an adjusted energy threshold. The comparison may result in an increased energy level of the filter. In one embodiment, if a mobile station is in soft hand-off, the base station ignores the lock state of the fingers and transmits power control information based on the received signal energy. If the mobile station is not in soft hand-off a predetermined power control pattern is applied for gradual power adjustment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.