Synchronization techniques and systems for spread spectrum radiocommunication
US6278699A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1998 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Jun 22, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/027
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for synchronizing to a time structure associated with base station transmissions in a radiocommunication system are described. A broadcast control channel can contain synchronization symbols within one or more of a plurality of timeslots. The symbols can be provided as periodic, e.g., exponential, signals which introduce a frequency deviation into the broadcast control channel. This frequency deviation can be recognized by the receiver to synchronize to the time structure of the base station transmissions. Moreover, the variation in the frequency deviation caused by phase rotation associated with local oscillator inaccuracy can also be compensated to achieve frequency synchronization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.