Antenna verification method for advanced closed loop mode-one transmitter antenna diversity
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United States of America Patent
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Aug 26, 2003
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N/A
app pub date -
Sep 26, 2000
filing date -
Sep 26, 2000
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Abstract
A method for use in a wideband CDMA telecommunications system wherein the base station (BS) utilizes transmit antenna diversity. The method enables the user equipment (UE) to verify an antenna weight for one of a plurality of transmit antennas that was previously signaled by the UE to the BS, and includes steps of (a) rotating a channel estimate of a dedicated pilot channel by the complex conjugate of an estimate of a common pilot channel to form an estimate of transmission weight used by the BS; (b) quantizing the estimated transmission weight to one of the half planes of the complex plane; (c) determining a value of a feedback command that the BS received in a previous slot and using that value along with a previously determined feedback command value to verify the antenna weight/and (d) using the verified antenna weight when combining common pilot channel estimates for propagation paths from the plurality of transmit antennas.
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