摘要
提出一种基于特殊电磁矢量传感器阵列的广义旁瓣相消器。首先在理论层面推导得到广义旁瓣相消器最优权矢量;针对信号是否在偶极子均匀圆阵处发生极化失配的四种情况进行讨论,进而明确阵列广义旁瓣相消器的适用场合;最后对广义旁瓣相消器和Capon波束形成器进行性能对比。理论分析和仿真实验表明,将广义旁瓣相消器推广到电磁矢量传感器阵列,充分利用信号在极化域的差异,可实现期望和干扰空域信息完全相同情况下的波束形成;在高输入信噪比情况下,广义旁瓣相消器相对于Capon波束形成器对角度估计误差具有更高鲁棒性。
One certain type of Generalized Side-lobe Canceller based on electromagnetic vector-sensor array is proposed.Firstly,the optimum weight of GSC is investigated.The four conditions whether the signals that are incident on uniform circular array are polarization-mismatch have been discussed in the following content.Consequently,the application situations of GSC-beamformer have been ascertained.Finally,a performance comparision between GSC-beamformer and Capon-beamformer is made to obtain a result that the former one is robuster to the angle estimation error than the latter,especially when the input-SNR is high.Both of theoretical analysis and simulation results show that,GSC-beamformer based on electromagnetic vector-sensor array can cancel the interfering signals successfully even when all the signals have the same spatial informations.
出处
《航天电子对抗》
2011年第4期58-61,共4页
Aerospace Electronic Warfare
基金
国家自然科学基金(61072098
61072099)
