AUTONOMOUS CALIBRATION AND CONTROL OF TRANSMIT DIVERSITY WEIGHTS USING RECEIVED SIGNALS FOR A TDD SYSTEM

摘要

In a diversity transmission TDD system, a calibration table is selectively used to determine diversity parameters for uplink transmissions. In one example, a UE includes two antennas and receives a downlink transmission separately at each antenna. The difference in phase of the two versions of the received downlink transmission is selectively used to determine uplink diversity transmission parameters from prior diversity transmission parameters stored in the calibration table.