| 摘要 |
PURPOSE:To improve precision by detecting the acceleration motion of a moving target and varying the weight coefficient of a tracking filter so that an error in position estimation, etc., is reduced. CONSTITUTION:A reflected wave which is generated by reflecting a radio wave transmitted from a transmistter 3 by the moving target is received by a receiver 4, and a Doppler frequency detecor 5 detects a Doppler frequency. This Doppler frequency and an estimated Doppler frequency from a Doppler frequency estimating device 8 are inputted to an accleration motion detector 9, which detects the acceleration motion of the moving target. The weight coefficient of the tracking filter 7 is controlled responding to the acceleration motion to reduce an error in position estimation, etc. |
