Impairment determination for a diversity antenna selection process
US6118773A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0825
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A diversity selection process which tests to determine whether poor reception is caused by co-channel interference or multipath fading is disclosed. The impairment is determined by first testing the quality over several frames. Unless the quality is poor over these several frames, the system tests for multipath fading by selecting the antenna with the greater signal strength, provided no hold condition exists. However, if poor quality has been present over the several frame period, the system selects the other antenna if its RSSI is greater. However, the system also tests the RSSI received on the current antenna and determines the impairment was co-channel interference if the signal of quality was sufficiently high. In which case a hold condition is set for a number of frames to prevent excessive switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.