基于信道容量的无源探测定位精度分析  

Analysis on passive detection and location accuracy based on channel capacity

作　　者：张曙[1] 杨作军[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2013年第2期245-250,共6页Journal of Harbin Engineering University

基　　金：国防科工局基础研究基金资助项目(40106030503)

摘　　要：为客观评价无源探测定位系统的定位精度,文章提出了将系统信道容量C(度量信号在信道上传输能力的测度)等效于在无源探测定位系统中衡量定位精度的测度R新概念.从信息论的角度出发,在相对探测误差意义下,将系统信道容量C与衡量目标定位精度联系起来,进而无源测向交叉定位原理模型被抽象成信道模型.采用信道容量衡量的定位精度不依赖于观测站基线的长度L或目标到基线的距离R,以及观测站的测向误差的一致性.计算与仿真结果给出了定位精度最高时观测站对目标T的最优观测角度和2个观测站的测向射线最优交会角以及观测区域内的信道容量分布,为快速配置观测站达到准确的无源探测定位提供了理论支持.For the purpose of objectively evaluating the location accuracy of the passive detection and location sys- tem, the researchers utilized a new concept which allows the system channel capacity （ the measure of signal trans- mission ability in the channel） to be equivalent to the measure weighing the location accuracy in a passive detection and location system. Derived from information theory, in the sense of relative detection error, the system channel capacity is associated with the measure of location accuracy and therefore the model of passive cross-bearing location theory is abstracted to be channel model. The location accuracy measured with channel capacity is independent of the baseline length L of observation stations or the distance R between target and baseline, and the consistency of direction finding errors. The results of calculation and simulation reveal the optimal observation angles to the target T from the observation station, the optimal cut angle of direction finding rays from two stations, and the distribution of the channel capacity in the observation area, when the location accuracy is the highest. The conclusions provide theoretical support of the rapid configuration stations ability to achieve accurate passive detection and location.

关 键 词：无源探测定位 信道容量 定位精度 最优交会角 测向交叉定位 

分 类 号：TN953[电子电信—信号与信息处理]