摘要
高频地波雷达(HFSWR)利用电磁波绕射的原理能够实现超视距的目标探测,但由于电磁波复杂的传播路径,引入了十分强烈的多径杂波。集中式多输入多输出(MIMO)的引入使多径信号可被直观地探测到,从而为多径杂波的抑制提供了有效方案。本文首先分析了多径信号在集中式MIMO-HFSWR场景下的信号模型,并针对此现象构建了基于广义旁瓣对消器(GSC)结构的自适应联合滤波算法,联合发射维和接收维的信息,实现对多径杂波的有效抑制。将本文所提方法与传统方法进行对比,证明了本文所提方法对多径杂波抑制具有显著的性能优势,能够抑制多径杂波超过30 dB。
High Frequency Surface-Wave Radar(HFSWR)exploits the diffraction of electromagnetic(EM)waves to achieve over-the-horizon target detection;however,the complicated propagation paths of these waves introduce intense multipath clutter.The adoption of centralized Multiple-Input Multiple-Output(MIMO)technology allows multipath signals to be observed directly,thereby offering an effective means of suppressing such clutter.This paper first derives the signal model of multipath returns in centralized MIMO-HFSWR,targeting this phenomenon,develops an adaptive joint filtering algorithm based on the Generalized Sidelobe Canceller(GSC)architecture.By jointly exploiting information in both the transmit and receive dimensions,the algorithm achieves effective suppression of multipath clutter.Comparative results with conventional methods demonstrate that the proposed approach offers significant performance advantages,providing more than 30 dB of multipath-clutter suppression.
作者
王霖玮
费泓博
刘爱军
于长军
WANG Linwei;FEI Hongbo;LIU Aijun;YU Changjun(School of Information Science and Engineering,Harbin Institute of Technology at Weihai,Weihai Shandong 264209,China)
出处
《太赫兹科学与电子信息学报》
2025年第9期950-956,共7页
Journal of Terahertz Science and Electronic Information Technology
基金
国家自然科学基金资助项目(62031015)
泰山学者特聘专家计划资助项目(20190957)。
关键词
高频地波雷达
多输入多输出(MIMO)
多径杂波
广义旁瓣对消器(CGS)
收发联合
High-Frequency Surface Wave Radar(HFSWR)
Multiple Input Multiple Output(MIMO)
multipath clutter
General Sidelobe Canceller(CGS)
joint transmit and receive
