发明名称 |
ADAPTIVE ANTENNA TRANSMISSION AND ANTENNA CALIBRATION |
摘要 |
The present invention relates to a method for adapting transmission parameters in a transmitter Tx in communication with at least one antenna 27; 38; 47; 57; 77, 88. The method comprises: transmitting a signal from the transmitter Tx measuring at least one reflection coefficient S11 of said signal for each antenna 27; 38; 47; 57; 77, 88, and adapting the transmission parameters based on the measured reflection coefficient S11. The antenna could be a transmit antenna and/ or a receive antenna. In a preferred embodiment antenna calibration may be performed by measuring propagation time for each individual transmitter chain 481, 482; 781, 782, and compensate for differences in time delay between the individual transmitter chains 481, 482; 781, 782 to assure that the signal is transmitted simultaneously from all transmit antennas. |
申请公布号 |
WO2008156389(A1) |
申请公布日期 |
2008.12.24 |
申请号 |
WO2007SE00612 |
申请日期 |
2007.06.21 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL);ASPLUND, HENRIK;MEDBO, JONAS;RIBACK, MATHIAS |
发明人 |
ASPLUND, HENRIK;MEDBO, JONAS;RIBACK, MATHIAS |
分类号 |
H04B17/00;H04B1/10;H04B7/005 |
主分类号 |
H04B17/00 |
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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