多目标位置信息场定位法性能分析

Performance Analysis of Position Information Field Location Method for Multi-target

复杂电磁环境下,观测站获得的用于目标定位的参数测量精度有时并不理想,甚至得到错误参数。针对多目标位置信息场定位法在复杂电磁环境下的适应性问题,分析了代价函数在剔除误差较大或错误数据中的显著作用,总结了其在实际应用中的具体实施步骤。以多站无源测向定位为例,通过仿真实验对多目标位置信息场定位法进行性能评估,并与最大似然估计定位法进行对比。仿真结果表明,在部分测量参数存在较大误差甚至错误条件下,多目标位置信息场定位法仍然可以得到较好的定位结果。

The measuring accuracy of parameters for the target location obtained by stations was often not ideal in the condition of complex electromagnetic environment, which might even get error measurement parameters. With complex electromagnetic environment, the significantly effect of the cost function in eliminating larger er- ror or false data was analyzed, and concrete implementation steps in practical application was summarized for a- daptability problems of position information field （PIF） location method. Taking passive direction finding loca- tion by multiple stations as an example, the performance of PIF location method was evaluated in comparison with maximum likelihood estimation （MLE） location method. Simulation results showed that PIF location meth- od could get better positioning results in the presence of some large error and even wrong measuring parameters.