| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To detect a low S/N target under turning motion without increasing an erroneous target number. <P>SOLUTION: A distance and an azimuth of the target detected by a low threshold detector 103 are calculated by a distance calculator 104 and an azimuth calculator 105, and are converted further into an X-Y coordinate system by a coordinate converter 106. A moving distance calculator 108 calculates a moving distance of the target, based on a position of the target converted into the X-Y coordinate system and a data as to a detection time therein. A line segment extractor A110 extracts a data row forming a line segment on a rectangular coordinate plane of the calculated moving distance in the detection time as a candidate of a data row of the target. An intervector angle calculator 111 calculates an intervector angle difference of the target, out of the data sequences of the target candidates extracted by the line segment extractor A110, based on the position of the target in the X-Y coordinate system and the data as to the detection time therein. A line segment extractor B112 extracts a data row forming a line segment on a rectangular coordinate plane of the calculated intervector angle in the detection time, and outputs the extracted data row as a true target data row. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
