| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To compensate a distance offset caused by pulse compression without causing an increase of H/W, and to improve distance accuracy. <P>SOLUTION: A phase dispersion band width or a width of a transmission pulse is set at a certain value and transmission is performed N times, and set at the other value and transmission is performed N times. A group of received signals corresponding to first transmission pulses and a group of received signals corresponding to later transmission pulses of N times are subjected to pulse compression processing, respectively, and then, to integration processing. A target signal is detected from the signals after the integration processing by threshold determination. A distance is determined from a difference between a time of the transmission of the transmission pulse and a time of the detection of the target signal. Data on a pair of target signals of which the Doppler filter numbers in the integration processing are in a prescribed difference or below out of the target signals corresponding to the two groups, respectively, are extracted. A difference in distance data on the paired target signals is calculated. A correlation between a Doppler frequency of a target and the Doppler filter number thereof is determined from a distance difference and correlation data are extracted. The distance offset generated in the pulse compression is compensated on the basis of specifications of the transmission pulse of the correlated Doppler frequency of the target. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
