| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology for setting a filter coefficient so that reduction of a delay amount of a digital filter and deterioration of a radio characteristic are balanced. <P>SOLUTION: In an FIR-type digital filter constituted of the prescribed number of taps, an impulse response includes: the front part of the filter coefficient when the front part of the impulse response is constituted of the number of taps, which is smaller than the prescribed number of taps; and a latter part of the filter coefficient when the latter part of the impulse response is constituted of the number of taps, which is larger than the prescribed number of taps. They become asymmetric. Since the number of taps to a peak value of the impulse response is reduced, processing delay can be reduced and the number of taps after the peak value is increased so as to improve the radio characteristic. <P>COPYRIGHT: (C)2012,JPO&INPIT |
