| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make more surely performable the separation of a plurality of targets existing on near positions. <P>SOLUTION: Concerning a beat signal of a received wave, for example, a frequency spectrum by FFT in every FM rising section is accumulated in one or more times in an accumulation part 70. A through part is determined from the plurality of accumulated frequency spectrums by a determination part 72, and each beat frequency of peak parts positioned on both sides of the determined through part is acquired as beat frequencies of different targets by a peak frequency extraction part 74. <P>COPYRIGHT: (C)2003,JPO</p> |
