摘要
针对存在主瓣干扰在内的多点源干扰情况,现有的阻塞矩阵预处理和特征投影预处理都取得了一定的抗干扰效果,其主要思想都是先通过预处理消除主瓣干扰,再进行常规自适应波束形成,实现对主瓣干扰的抑制,但是这2种方法需要期望和干扰的先验信息来构造预处理矩阵。为解决实际运用当中先验信息无法直接获取的问题,采用强弱信号波达方向估计方法和估计出期望信号方向和干扰方向,再结合基于伪协方差矩阵的特征投影预处理的主瓣抗干扰方法,得到一种无需先验信息的抗多点源干扰算法。仿真实验结果表明,所提方法在不知道角度先验信息的条件下于多点源干扰处形成了大于60 dB的空陷,且相比于其他方法,波形保持好,受快拍数的影响小,取得了较好的抗多点源干扰效果。
To deal with the problem of multipoint source interference including main lobe interference, the two methods of suppressing the main-lobe interference based on blocking matrix preprocessing and based on eigen-projection matrix preprocessing are quite good in anti-interference effect, and their main ideas are main-lobe interference eliminated by pretreatment of first, then the conventional adaptive beam formation, the implementation of the main-lobe interference suppression, but the two methods need to expect a prior information matrix to construct the pretreatment and interference . Aimed at the problem that the prior information fails to be obtained directly in the practical application, a new type of principal anti-multipoint source interference algorithm without prior information is proposed in combination with the method of the preprocessing of the characteristic projection with the estimation of the arrival direction of the strong and weak signal. The simulation results show that the proposed method is fairly good in the effectiveness of anti-multipoint source interference effect without knowing the prior information of angle.
作者
晏冲
张永顺
葛启超
潘帅
YAN Chong;ZHANG Yongshun;GE Qichao;PAN Shuai(Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China)
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2019年第3期97-102,共6页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家自然科学基金(61501501)
关键词
主瓣抗干扰
波达方向估计
协方差矩阵重构
自适应波束形成
main-lobe anti-interference
DOA estimation
covariance matrix reconstruction
adaptive beam formation
作者简介
晏冲(1994-),男,贵州遵义人,硕士生,主要从事阵列天线抗干扰研究。E-mail:1137366857@qq. com.
