摘要
针对已有时差(TDOA)定位模型通常需要引入一个恒定中间变量而不适合运动多平台连续定位的不足,推导了三维空间中无需中间变量的TDOA定位模型并在此基础上提出了一种加权辅助变量(WIV)连续定位算法。该算法首先推导代入TDOA测量值后新定位方程的误差项,求得误差项的协方差后将其用于构造最优辅助变量(IV)矩阵,并采用总体最小二乘(TLS)算法的估计值计算次优IV矩阵。仿真结果表明,所提WIV算法能够有效实现运动多平台TDOA连续定位。
Existing time-difference-of-arrival （TDOA） localization model usually needs to introduce an intermediate variable and thus is not suitable for moving multi-platform continuous localization. To solve this problem, a TDOA model in 3-D space is deduced which doesn＇t need any intermediate variable and a weighted instrumental variable （WIV） is proposed based on it. The proposed algorithm first deduces the error item of the new localization equation after substituting the true TDOA for its measured counterpart. The covariance of the error item is deduced to construct an optimal instrumental variable （IV） matrix and the total least squares （TLS） algorithm is used for sub-optimal IV matrix calculation. Simulation results show the effectiveness of the proposed WIV algorithm for moving multi-platform TDOA- based continuous localization.
作者
骆卉子
曲长文
徐征
LUO Hui-zi QU Chang-wen XU Zheng(Naval Aeronautical and Astronautical University,Electronic and Information Engineering Department Shandong Yantai 264001, China)
出处
《现代防御技术》
北大核心
2017年第1期126-131,共6页
Modern Defence Technology
基金
泰山学者建设工程专项经费资助
关键词
定位
多平台
时差
三维空间
加权辅助变量
总体最小二乘
positioning （ localization ）
multi-platform
time difference of arrival （ TDOA ）
three dimensional （ 3-D ） space
weighted instrumental variable （ WIV ）
total least squares （TLS）
