中文摘要：

本文在Maximin波束形成方法的基础上,提出了一种正交多干扰子空间矩阵对方法。本方法可有效分离同信道多窄带干扰信号,同时利用期望信号与干扰信号到达方向不同,对自相关矩阵对进行广义特征值分解实现干扰背景下PN码序列的同步和波束形成。在信号同步上,无需导频信道信息和训练序列信息;在同步过程中得到的与主广义特征值相应的特征向量可以直接作为波束形成器的权向量,进行后续的波束形成。仿真比较实验结果证明,所提方法可以抵抗与期望信号不同方向的窄带强干扰,尤其在强多用户干扰和强窄带干扰背景下,与PAPC（pre and post correlation）方法和FP（filter pair）方法相比具有明显的性能优势。

英文摘要：

In this paper,we propose a novel antenna array system based on covariance matrix pair analysis,including PN synchronization followed by a beamforming process.Generally,conventional blind beamformers in DS-CDMA systems generally have either unreliable convergence rate or signal cancellation problems in practical signal environment.In our method,we use an orthogonal projection scheme to realize both the synchronization and beamforming,which requires neither the direction of the desired signal nor the array geometry information.Actually we are capable of acquiring antenna vector in the synchronization part,and constructing the corresponding beamformer as a by-product.The promising advantage of our scheme is that,by utilizing a small number of signal-free interference samples,the beamformer has a high convergence rate and is independent of signal strength.Simulation results prove that it has better performance than the pre and post correlation（PAPC） scheme and filter pair（FP） scheme,especially under strong multiple access interference（MAI） and jammings.