Method and apparatus for beamforming in a wireless communication system
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United States of America Patent
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Aug 17, 2004
Grant Date -
N/A
app pub date -
Sep 1, 1999
filing date -
Sep 1, 1999
priority date (Note) -
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Abstract
In a CDMA data communication system capable of variable rate transmission, utilization of beamforming techniques decreases the average interference caused by transmissions of a base station to subscriber stations in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled phases, to form transmit signal beams corresponding to individual subscriber stations. Data and reference signals are transmitted along beams that change according to fixed time slots and sub-slots in order to maximize carrier-to-interference ratios (C/I) measured at subscriber stations.
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