| 摘要 |
<p>The characteristics of an equalizer are changed in accordance with the characteristic of a radio propagation path. A linear filer part (20), which has a plurality of taps, equalizes an equalizer input signal (202) to output a filter output signal (206). A DFE part (22), which has a plurality of taps, equalizes, based on a decision feedback, a DFE input signal (208), which is the same as the filter output signal (206), to output an equalizer output signal (204). An LMS algorithm part (24) calculates tap coefficients of the linear filer part (20) and DFE part (22). A decision part (26), which stores a predetermined threshold value in advance, compares a received delay spread value (200) with the threshold value. If the delay spread value (200) is equal to or greater than the threshold value, then the decision part (26) decides an activation of the DFE part (22). If the delay spread value (200) is smaller than the threshold value, then the decision part (26) decides a deactivation of the DFE part (22).</p> |
