摘要
在无源定位领域中,传统的协同时差(TDOA)定位方法在处理批量目标时,由于计算复杂度高导致定位实时性低和定位精度低。提出一种改进的TDOA算法,通过动态地修正加权最小二乘法(WLS)的加权矩阵,使初值估计与迭代交替进行,达到降低计算复杂度和提高目标位置精度的目的。为了进一步分析定位精度,论述一种定位精度分析方法。实验结果表明改进定位算法既提高原始方法的定位实时性又提高定位精度,另外选择合适的布站形式可以提高定位精度。
In passive location, when traditional TDOA co-location methods＇ processed batch targets, the large calculation resuhed in low real-time location and low positioning accuracy. Presents an improved TDOA algorithm, through correcting the weighted matrix of WLS dynamically to make preliminary value estimation and iterative alternate, so as to achieve the purpose of correcting target location and reduce the amount of calculation. In order to analyze the positioning accuracy further, discusses a location precision method. The experimental results shows that improved location method not only improves old method＇s real-time location but also enhances positioning accuracy, and chooses suit- able base-station layout can increase positioning accuracy.
基金
国家自然科学基金(No.91338107)
