| 摘要 |
The invention relates to a method for controlling the downlink beam in a radio communication system, said radio communication system comprising an antenna system with several antenna elements (AE). The inventive method comprises the following steps: a) examining a received uplink signal sent by a transmitter for the existence of phase correlations between parts of the uplink signal (S1) received from various antenna elements of the antenna system, and b) if a phase correlation is detected (S3), assigning at least one source direction to the uplink signal and sending the downlink signal in the source direction (S5, S7). If a phase correlation is not detected (S10), however, the downlink signal is sent in a non-directional manner in the form of several components (S11) produced using at least one diversity technique.
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