多运动站异步观测条件下的直接定位算法

发布时间：2018-04-17 22:08

本文选题：无源定位 + 异步观测　；参考：《电子与信息学报》2017年02期

【摘要】：针对多运动站无源融合定位系统中的异步观测问题,该文提出一种基于空间谱分析的直接定位算法。首先利用子空间分析理论建立异步观测直接定位模型,构造多站协同定位联合空间谱函数,采用多级搜索方法实现定位解算。然后推导了该算法的定位误差协方差矩阵及克拉美罗下限。最后对该算法在异步观测条件下的定位性能进行蒙特卡洛仿真。仿真结果表明算法定位精度能够逼近克拉美罗下限,定位性能优于基于定位参数的分步定位算法,尤其在低信噪比情况下优势更明显。
[Abstract]:In order to solve the asynchronous observation problem in multi-moving station passive fusion localization system, a direct localization algorithm based on spatial spectrum analysis is proposed in this paper.Firstly, the direct location model of asynchronous observation is established by using the theory of subspace analysis, and the joint spatial spectrum function of multi-station cooperative positioning is constructed, and the multi-level search method is used to realize the location solution.Then, the location error covariance matrix and Clemero lower bound of the algorithm are derived.Finally, the localization performance of the algorithm under asynchronous observation is simulated by Monte Carlo simulation.Simulation results show that the location accuracy of the algorithm can approach the lower limit of Clemero, and the localization performance is better than the step location algorithm based on location parameters, especially in the case of low signal-to-noise ratio (SNR).
【作者单位】：海军航空工程学院电子信息工程系;海军航空工程学院科研部;
【分类号】：TN911.7

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