ESTIMATING ARITHMETIC UNIT AND ESTIMATING ARITHMETIC PROGRAM

摘要

To provide an estimating arithmetic unit and an estimating arithmetic program which reduces processing load while maintaining accuracy.SOLUTION: An estimating arithmetic unit includes: a α-β filter processing section, a Kalman filter processing section, an extended Kalman filter processing section, and a first selection section. The α-β filter processing section derives estimated position coordinates, an estimated speed, a turning radius for a target by performing α-β filtering observation data of the target acquired by a radar device. The Kalman filter processing section and the extended Kalman filter processing section derives the estimated position coordinates and the estimated speed for the target from the observation data acquired by the radar device. The first selection section causes the Kalman filter processing section to perform Kalman filter processing when the turning radius derived by the α-β filter processing section is larger than a threshold, and causes the extended Kalman filter processing section to perform extended kalman filter processing when the turning radius derived by the α-β filter processing section is smaller than the threshold.SELECTED DRAWING: Figure 1