| 摘要 |
PROBLEM TO BE SOLVED: To provide beamforming techniques used to decrease the average interference caused by transmissions of a base station to subscriber stations in neighboring cells, in a CDMA data communication system capable of variable rate transmission.SOLUTION: Base stations 102, 104 utilize various transmit antennas 106, 108 each transmitting signals with controlled phases in order to form transmit signal beams 110, 118, 122 corresponding to individual subscriber stations 112, 116. Data and reference signals are transmitted along beams 110, 118, 122 that change according to fixed time slots and sub-slots in order to minimize carrier-to-interference ratios (C/I) measured at subscriber stations 112, 116. |
