| 摘要 |
Received baseband signals from a plurality of antennas 11 1 to 11 Q are linearly combined through multiplication by weighting coefficients, then a decision signal is delayed for one symbol duration, and the delayed signal is multiplied by a feedback filter coefficient w b* to generate intersymbol interference, which is subtracted from the linearly combined output y(i). The subtracted output is subjected to a signal decision to obtain a decision signal, then the difference between the input into a decision unit 17 and the decision signal is obtained as an error signal e(i), and weighting coefficients w1* to w Q and the feedback filter coefficient w b* are estimated in a parameter estimation part 71 so that the square of the error signal e(i) is minimized. At the transmitting side a transmitted signal is delayed for 1T and is then multiplied by the feedback filter coefficient w b*, then intersymbol interference is subtracted from the transmitted signal to distort it, and the distorted signal is multiplied by the weighting coefficients w1* to w Q*, respectively, thereby creating transmitted baseband signals for application to the antennas 11 1 to 11Q
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