Method and apparatus for interference cancellation
US6006072A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1998 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Mar 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In first radio station and a second radio station constituting a radio transmission system using spatial duplex diversity, interference signals are cancelled by a power inversion adaptive array (PIAA). One branch of the transmission side is multiplied by a complex coefficient multiplier so that the desired received signal has the optimum vector value after a combination of two branches and PIAA processing. An envelope detector detects the received signal level with an envelope detector at the receiving side, feeds back the received signal level information to the transmission side through the transmission baseband circuit, extracts the information with the receiving baseband circuit at the transmission side, and inputs the information into a constant modulus algorithm control circuit. The constant envelope algorithm control circuit sequentially controls the complex coefficient multiplier so that the multiplier has an optimum value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.