| 摘要 |
Modifying a signal includes facilitating transmission of the signal from a modifying communication device to a feedback communication device. Power indicators reflecting the power of the signal as received by the feedback communication device are received. Previous power indicators reflect the power of the signal adjusted according to a previous modification, and current power indicators reflect the power of the signal adjusted according to a current modification. A previous power descriptor value is estimated from the previous power indicators, and a current power descriptor value is estimated from the current power indicators. A modification increment is determined in accordance with the previous power descriptor value and the current power descriptor value. A next modification is calculated from the current modification and the modification increment, and a phase and an amplitude of the signal are adjusted in accordance with the next modification.
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