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针对以往单站无源定位系统中长短基线干涉仪系统复杂、角度测量易受干涉仪通道幅度/相位不一致的影响等问题,提出了一种仅仅利用长基线干涉仪(LBI)的相位差变化率实现单站无源定位的新方法,并对该定位方法误差的克拉美-罗下限(CRLB)进行了推导和分析,计算并分析了不同的干涉仪基线安装方向、不同的观测器运动方式下的定位误差几何分布(GDOP)。结果表明,仅用相位差变化率定位时,为了达到侧翼最好精度,干涉仪最好平行机身安装;为了达到侧前方较好精度,干涉仪需垂直安装;观测器的运动姿态最好发生某种机动变化。
Aiming at the problems that the system of long and short baseline interferometer in a single station passive positioning system is complex and the angle measurement is easily affected by the amplitude / phase of the interferometer channel, this paper proposes a new method that only uses the phase difference of the long baseline interferometer (LBI) A new method of single-station passive location is proposed, and the CRLB error of the localization method is deduced and analyzed. The different baseline installation directions of interferometer are calculated and analyzed. Under different observer movement modes Positioning Error Geometric Distribution (GDOP). The results show that the interferometer should be mounted parallel to the fuselage in order to achieve the best accuracy of the wing when using only the phase difference rate of change. In order to achieve better accuracy in front of the side, the interferometer should be mounted vertically. Some kind of maneuver change.