Selective modification of antenna directivity pattern to adaptively cancel co-channel interference in TDMA cellular communication system
US6411612B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1998 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | May 19, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A base station signal processing mechanism for a time division multiple access (TDMA) cellular communication system adaptively controls weighting coefficients of the base station's phased array antenna in a manner that forms a directivity pattern whose gain and/or nulls maximize the signal to noise ratio in the presence of co-channel users whose communication time slots overlap a communication time slot of a desired user. The signal processing mechanism performs correlation processing of synchronization patterns contained in signals transmitted by co-channel users to identify times of transitions between successive co-channel users' communication time slots relative to a time of transition of the desired user's communication time slot, and deriving weighting coefficients in accordance with the times of transitions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.