| 摘要 |
<p>The present invention relates to a method and apparatus for adaptively compensating for channel or system variations in which adaptive compensation is used in the receiver (16) of a digital communication system (10). The transmitter (12) of the digital communication system (10) includes a precoder (22). The adaptive receiver compensation mitigates the interference not removed by the transmitter precoder (22). In an embodiment ot the invention, the adaptive compensation can be performed using an adaptive feedforward filter (30) and a feedback filter (38) in the receiver (16). The feedback filter output is generated based on previous values of estimates of the transmitted precoded sequence. The determined value of the feedback filter coefficients can be periodically relayed to the transmitter (12) after the value of the coefficients exceeds a predetermined threshold. Accordingly, the receiver (16) adaptively and automatically compensates for misadjustments of the fixed transmitter precoder (22) with respect to the actual channel at a given point in time.</p> |
