摘要
针对空间临近强干扰下常规干扰阻塞法导致的空间谱基底起伏和目标峰值衰减问题,提出一种基于导向矢量修正的空间临近强干扰阻塞方法。理论推导了阻塞矩阵处理后多重信号分类法(MUSIC)的空间谱表达式,在分析空间谱基底起伏原因的基础上,给出了模值一致化约束下的导向矢量修正公式。计算机仿真实验表明,该方法解决了空间谱基底起伏问题,恢复了弱目标谱峰;与传统干扰阻塞法相比,更适合空间临近强干扰场景,且对信噪比和阵元数的要求更低。
Under spatially adjacent jamming,the jamming jam method would cause the base fluctuation of spatial spectrum and the decrease of target's peak.A spatially adjacent jamming jam method based on modified steering vector was proposed to solve the problem.Firstly,the spatial spectrum formula of MUSIC after blocking matrix process was derived.Secondly,the reason of base fluctuation of spatial spectrum was analyzed theoretically.Finally,the steering vectors were modified to keep theirs modulus equal.Simulation results showed that the proposed algorithm could effectively solve the base fluctuation of spatial spectrum and recovered the spectral peak of weak target.Compared to the conventional jamming jam method,the proposed algorithm was more effective to cancel spatially adjacent jamming in low signal-to-noise ratio or little number of array elements.
作者
田蕴琦
向龙凤
肖开奇
朱磊
TIAN Yunqi;XIANG Longfeng;XIAO Kaiqi;ZHU Lei(Science and Technology on Electronic Information Control Laboratory, Chengdu 610036, China)
出处
《探测与控制学报》
CSCD
北大核心
2021年第4期92-96,共5页
Journal of Detection & Control
基金
装备预研中国电科联合基金项目资助(6141B083002)。
关键词
主瓣干扰抑制
弱目标方位估计
导向矢量修正
空间临近强干扰
阻塞矩阵
main-lobe interference suppression
direction estimation for weak signals
modified steering vector
spatially adjacent jamming
blocking matrix
