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

作　　者：何德明 杜鑫苹 夏威 李会勇 李明 HE Deming;DU Xinping;XIA Wei;LI Huiyong;LI Ming(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;Yangtze Delta Region Institute(Quzhou),University of Electronic Science and Technology of China,Quzhou 324003,China;不详)

机构地区：[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

出　　处：《信息对抗技术》2024年第2期27-37,共11页Information Countermeasures Technology

基　　金：国家自然科学基金资助项目(61871104,62231006);衢州市大科创项目基金资助项目(2022D013)。

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。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 proposed for sky-wave OTH emitters based on the maximum likelihood(ML)criterion.Further,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 proposed algorithm were analyzed to evaluate the performance of the proposed algorithm.Illustrative simulation results have demonstrated that compared with the traditional DPD algorithm which is applied to locating line-of-sight emitters,the performance of the proposed algorithm 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 CRLB 

分 类 号：TN911.72[电子电信—通信与信息系统]