| 摘要 |
A method in a remote unit, the method comprising: transmitting, via a channel, a first signal to an adaptive array antenna system, wherein the first signal embodies primary data (Fig. 3), and wherein the first signal further embodies a reference signal (Fig. 4) to be analyzed by the adaptive array antenna system to establish a set of transmit and receive weights for communicating with the remote unit; transmitting, via the channel, a second signal (Fig. 5) to the adaptive array antenna system for which a reference signal is not available; receiving, via the channel, a downlink signal from the adaptive array antenna system, wherein the received downlink signal incorporates updated transmit and receive weights for communicating with the remote unit based on primary data Z 1 derived by the adaptive array antenna system from the first signal and further based on secondary data Z 2 derived by the adaptive array antenna system from the second signal, the updated transmit and receive weights for communicating with the remote unit applied to the downlink signal by the adaptive array antennas system to alter antenna beamforming and nullforming characteristics of an array of antenna elements of the adaptive array antenna system to adapt to changing characteristics of the channel, derived by the adaptive array antenna system based on differences between the first signal transmitted and the second signal transmitted. |
