双基地雷达两种目标定位方法误差分析与仿真

Error analysis and simulation of two target location methods for bistatic radar

为了在战场上更好地发挥双基地雷达的定位性能,比较双基地雷达常用的距离和-角度法与角度-角度法两种方法的定位性能的优劣,分析和仿真了以上两种方法显性解的测量精度受测量值的影响情况;分析其解析几何模型的定位误差,并仿真了目标位置的精密度的几何逼近法GDOP(Geometric Dilution of Precision)分布.结果表明,基线附近两种方法定位误差都较大;当目标到收发站距离大于20km时,距离和-角度法的定位精度要好于角度-角度法.

In order to improve performance of bistatic radar on the battlefield, the location performance of azimuth-elevation measurements and azimuth-azimuth measurements is compared. The influence of variation of measuring values on measurement accuracy of dominant solution to the above methods is analyzed and simulated. The location error of analytic geometry model of the two methods is analyzed. Then the GDOP（Geometric Dilution of Precision） of target position is simulated. The simulation demonstrates that the location errors of the two methods are both larger in the vicinity of baseline. When the distance between the target to receiver and transmitting station is greater than 20km, the location accuracy of azimuth-elevation measurements is higher than azimuth-azimuth measurements.