发明名称 |
Selective modification of antenna directivity pattern to adaptively cancel co-channel interference in TDMA cellular communication system |
摘要 |
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.
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申请公布号 |
US6411612(B1) |
申请公布日期 |
2002.06.25 |
申请号 |
US19980081287 |
申请日期 |
1998.05.19 |
申请人 |
HARRIS COMMUNICATION |
发明人 |
HALFORD KAREN W.;MARTIN GAYLE PATRICK;WILLINGHAM JULIAN BARTOW;WEBSTER MARK A.;SINCLAIR GREGORY S. |
分类号 |
H01Q1/24;H01Q3/26;H04B7/06;H04B7/08;H04W28/04;H04W84/04;H04W88/08;(IPC1-7):H04B7/212 |
主分类号 |
H01Q1/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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