一种天波超视距短波目标的直接定位算法
A direct position determination algorithm for shortwave sky-wave over-the-horizon emitters
何德明 1杜鑫苹 1夏威 1李会勇 1李明2
作者信息
- 1. 电子科技大学信息与通信工程学院,四川成都 611731
- 2. 电子科技大学长三角研究院(衢州),浙江衢州 324003
- 折叠
摘要
针对利用运动接收机对静止超视距短波无线电目标定位的问题,提出了一种基于极大似然准则的天波超视距直接定位算法,进一步应用引力搜索算法,以实现高效的目标位置估计.推导了在上述问题中目标位置估计的克拉美罗下界(Cramér-Rao lower bound,CRLB),并分析了所提算法的计算复杂度.仿真实验结果表明,与传统的针对视距目标的直接定位算法相比,所提出的算法能显著提高对天波超视距短波目标定位的精度,且性能非常接近CRLB;相比于对应的网格搜索算法,在保持较高定位精度的同时,所提算法具有更高的计算效率.
Abstract
The localization of stationary over-the-horizon(OTH)emitters which transmit shortwave signals is considered utilizing receivers mounted on fast moving platforms.To tackle the above problem,first,a direct position determination(DPD)algorithm was pro-posed for sky-wave OTH emitters based on the maximum likelihood(ML)criterion.Fur-ther,the gravitational search algorithm(GSA)was applied to achieve the efficient calculation in the emitter position estimation.Furthermore,the associated Cramér-Rao lower bound(CRLB)of the OTH emitter position estimation and the computational complexity of the pro-posed algorithm were analyzed to evaluate the performance of the proposed algorithm.Illus-trative simulation results have demonstrated that compared with the traditional DPD algo-rithm which is applied to locating line-of-sight emitters,the performance of the proposed al-gorithm is close to the associated CRLB.Additionally,compared with the corresponding grid search algorithm,the proposed algorithm is of higher computational efficiency while maintai-ning superior localization performance.
关键词
超视距定位/直接定位/引力搜索算法/CRLBKey words
OTH localization/DPD/GSA/CRLB引用本文复制引用
基金项目
国家自然科学基金(61871104)
国家自然科学基金(62231006)
衢州市大科创项目(2022D013)
出版年
2024
NETL
NSTL
维普
万方数据