垂直线列阵无源定位精度分析  

Precise analysis of passive localization based on vertical linear array

作　　者：曲毅[1] 刘忠[1] 刘爱军[1] 

机构地区：[1]海军工程大学电子工程学院,武汉430033

出　　处：《海军工程大学学报》2009年第2期92-96,112,共6页Journal of Naval University of Engineering

摘　　要：提出了一种基于垂直线阵的系统,给出了定位模型,并简要介绍了其定位原理。利用由时延引入的距离、高低角和观测得到的方位角信息,建立了三维坐标系下的状态方程和观测方程。通过理论分析和仿真计算,讨论了声速测量误差、时延估计误差和阵元位置误差对系统定位精度的影响,给出了时延估计误差的克拉美-罗下界。综合时延估计、基线横纵扰动、三类误差的影响,在一定条件下,对目标距离估计的相对误差可控制在20%以内。This paper presented a system based on vertical linear array. The localization model was presented, and the localization principle of vertical linear array was discussed. With the range, elevation angle induced from time-delay and the measurement of azimuth angle, three dimensional equations of state and equation of measurement were established. By theoretical analysis and simulation, the precise localization was dealt with according to the error of sound speed measurement, time-delay estimation and sensor position. Cramer-Rao low bound of the estimation error of time-delay was given, and the general conclusion of target distance precision based on vertical linear array was also put for ward.

关 键 词：垂直线阵 目标定位 精度分析 克拉美-罗下界 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]