S-CDMA fixed wireless loop system employing subscriber unit/radio base unit super-frame alignment
US6011788A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1997 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Dec 10, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/0015
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for operating a synchronous Code Division Multiple Access (S-CDMA) radio frequency communication system having a host transceiver unit and a plurality of user transceiver units. The method includes an initial step of defining a super-frame to be comprised of N sequential frames of data. In the preferred embodiment N is equal to three. For a user transceiver unit that obtains access to the host transceiver unit a next step of the method receives frames of data transmitted by the host transceiver unit and initially aligns a receiver timing and a transmitter timing of the user transceiver unit to a super-frame boundary of the received frames. A next step transmits frames of data from the user transceiver unit to the host transceiver unit using the initial timing alignment. A further step of the method detects at the host transceiver unit a difference between the arrival of the transmitted frames of data and a super-frame boundary and then transmits a timing correction parameter, preferably expressed in symbols, from the host transceiver unit to the user transceiver unit in order to align the transmitted frames of data to the super-frame boundary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.