Rapid synchronization for communication systems
US6041088A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Jun 10, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W92/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Different subscriber units (14) transmit different burst signals to a base station (12) on a common frequency to which a base station demodulator (64) is already synchronized. The base station (12) transmits constant values .alpha. and .eta., where .alpha. is multiplied by a base station reference frequency to achieve a base station transmitting frequency, and .eta. is multiplied by the reference frequency to achieve the base station (12) receiving frequency. A subscriber unit (14) synchronizes to the base station transmitting frequency. As a result of the synchronization process, the subscriber unit (14) determines a value .mu., which, when multiplied by a subscriber unit reference frequency, achieves the subscriber unit synchronization frequency. The subscriber unit then determines a value .gamma., which is proportional to .eta. and .beta. and inversely proportional to .alpha.. The subscriber unit reference frequency is multiplied by .gamma. to achieve the frequency at which the subscriber unit (14) transmits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.