| 摘要 |
<p>The search channel with the strongest reception of the search channels where a pre-target object was detected is stored as the peak channel (S410), and if the peak channel (Pt) of the current cycle changes from the peak channel (Pt-1) of the previous cycle (S420-Y), the pre-target object is considered to have moved between regions, and the boundary number (N) indicating the boundary of the divided regions that the pre-target object is straddling is found (S430). If the peak channel (Pt) is the same as the previous cycle (S420-N) and is at a region end (CH1 or CH7) (S440-Y), and the reception strength of the peak channel (Pt) is at or below a disappearance determination threshold (S450-Y), the pre-target object is considered to be moving outside the region, and the boundary number (N) indicating the boundary of the divided region that the pre-target object is straddling is found (S455 to S480). Then, trajectory coordinates are calculated assuming that the pre-target object is present on the boundary specified by the boundary number (N) (S490 to S510).</p> |
