三机无源定位二维布阵优化研究

Two-dimensional Optimal Sensors Placement for Passive Location System Using Three Aircrafts

针对三机无源定位二维布阵优化问题,提出了基于有效定位区面积最大准则的最优布阵方法。文中以三机时差定位、频差定位及时频差定位为例,描述了三机无源定位模型,接着基于克拉美-罗限引入了有效定位区的概念,并以其面积最大作为布阵优化准则,通过仿真研究了二维布阵优化问题。仿真结论反映了三机时差、频差及时频差定位体制的不同特性,具有较强的实际指导意义。

For optimal two-dimensional（2-D） sensors placement for 3-aircraft passive location system, a method based on maximum area principle is proposed. In this paper, 3-aircraft time difference of arrival （TDOA） location, frequency difference of arrival （FDOA） location and hybrid TDOA/FDOA location are taken as examples. First, the basic description of passive location models is given. Then, the concept of effective location region is introduced based on Cramer-Rao Lower Bound （CRLB）. Be- sides, the principle of maximum effective location area is given. Finally, the optimal 2-D sensors placement is investigated by com- puter simulation and the simulation results indicate some instructive conclusions,which reflect the characteristics of TDOA location system, FDOA localization system and hybrid TDOA/FDOA location system.