摘要
提出了一种改进的无源时差定位方法.该方法在主站增加对目标仰角的测量,形成了一个包含3个子系统的冗余定位系统.首先从各子系统获得3组含有模糊的定位结果,然后通过最近邻匹配消除定位模糊,最后对各子系统消除定位模糊后的结果进行简化加权最小二乘(SWLS)融合,获得了比传统无源时差定位方法更好的性能.仿真结果表明,目标高度较高时,改进方法与传统方法的定位精度相当;而对于低空目标,改进方法的定位精度远高于传统方法.
An improved passive TDOA location method is proposed. The novel method uses the elevation angle of the target as a new measurement to form a redundant location system consisting of three subsystems. Each subsystem can obtain a set of location results with ambiguity. A better performance can be achieved after eliminating the ambiguity by the nearest matching and processing the location results by SWLS fusion. Simulation results show that the proposed method has almost the same precision as the usual method for the higb-altitude targets; however, it has a much higher precision for the low-altitude targets.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2009年第5期862-866,共5页
Journal of Xidian University
基金
"十一五"国家部委预研基金资助(9140A07020806DZ01)
关键词
无源定位
到达时间差
仰角
低空目标
passive location
TDOA
elevation angle
low-altitude targets
