运动旋转基线单站无源定位CRLB分析

Single Station Passive Location CRLB Analysis in Consideration of Motion Rotation Baseline

针对仅用相位差变化率进行的单站无源定位,现有文献一般考虑干涉仪基线固定在观测平台上,并随其作某种机动下的定位效果,并未考虑基线自身旋转的情况,因此考虑观测平台机动,干涉仪基线自身旋转的情况,提出了基于运动观测平台旋转基线的无源定位方法,并对观测平台机动过程中基线自身不断旋转情况下的定位原理及其性能进行了分析,推导了该方法定位误差的克拉美罗下限(CRLB),仿真实验结果表明,该方法很好地改善了定位性能。

In view of the single station passive location using only the phase difference rate of change,the existing literatures generally consider the localization effect in the case that the baseline of the interferometer is fixed on the observation platform and do some maneuver without considering the rotation of the baseline itself.Therefore,this paper considers the situation of observation platform maneuverability and the self-rotation of interferometer baseline and proposes a passive location method based on the rotation baseline of the motion observation platform.The location principle and performance of the proposed method under constant rotation of the observation platform are studied and analyzed.And the Cramer-Rao lower bound(CRLB)of localization error is derived.The simulation results demonstrate the improved localization ability of the proposed method.