| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase detection/location accuracy even for a moving target of low RCS (Radar Cross Section) such as a target under a low S/N environment, a stealth target, or the like without deterioration in sharpness of an evaluation function P even in the case of long-time integration. <P>SOLUTION: A plurality of passive radar devices (10) comprises: a first receiving system for receiving scattered waves to generate time-series data; a second receiving system for receiving direct waves to generate time-series data; cross-correlation calculation means (16) for calculating cross correlations based on these time-series data and specifying a time difference of arrival at the moving target and a Doppler frequency difference as observation information; and target location means (17) for obtaining a location of the moving target using the observation information and angle measurement value information. The passive radar devices (10) are arranged at different locations. Each of the passive radar devices also includes communication means (18) for transmitting/receiving mutual observation information and instantaneous speed vector estimation means (19) for estimating an instantaneous speed vector of the moving target on the basis of pieces of observation information specified by all passive radar devices. <P>COPYRIGHT: (C)2012,JPO&INPIT |
