Wireless communication system for adapting to frequency drift
US5909640A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1997 |
| Grant date | Jun 1, 1999 |
| Priority date | — |
| Expiry date | Oct 6, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless communication system with one or more remote transceivers for transmitting a wireless data signal at an actual frequency that is different than the expected frequency and a base transceiver that can automatically adjust to receive the actual frequency. Each remote transceiver is adapted to initiate a wireless data signal at a selected time that is unique to that remote transceiver. The expected frequency is sequentially pre-determined in a pseudo-random sequence with each remote transceiver having a unique sequence. The base transceiver can respond to the remote transceiver at the actual frequency. Both the remote transceiver and the base transceiver can convert the wireless signals in a single step to baseband.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.