Adaptive cancellation for wireless repeaters
US6745003B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2000 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Jan 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/15564
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A repeater system has at least one donor antenna element for communicating with a base station and at least one link antenna element for communicating with a remote station. A radio frequency uplink path and a radio frequency downlink path are coupled between the donor antenna and the null antenna. An adaptive cancellation circuit in each of the radio frequency uplink path and the radio frequency downlink path generates a cancellation signal, which when added to a radio frequency signal in either of the radio frequency uplink and radio frequency downlink paths, substantially cancels any feedback signal present in the radio frequency signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.