基于子空间技术的常规多波束形成抗干扰算法  

Anti-jamming Algorithm of Conventional Multi-beam Forming Based on Subspace Technique

作　　者：王磊[1] 吴仁彪[1] 卢丹[1] 

机构地区：[1]中国民航大学智能信号与图像处理天津市重点实验室,天津300300

出　　处：《华东理工大学学报（自然科学版）》2011年第3期372-376,共5页Journal of East China University of Science and Technology

基　　金：国家863高技术计划(2006AA12Z321);民航局科技基金(MHRD0606);中国民航大学科研启动基金(07QD03X)

摘　　要：卫星导航系统(GPS)的很多抗干扰技术是以卫星信号来向估计为基础的,当估计卫星信号来向有困难时,这些算法将失效。提出了一种基于子空间投影的常规多波束抗干扰算法。该方法先进行子空间投影抑制干扰,然后在固定方向上采用常规波束形成方法(CBF)形成多个主波束,最后对每个波束得到的无干扰数据进行捕获及定位解算等。该方法的特点是不需要知道卫星信号来向,并且在信号方向上具有一定的天线增益,适用于天线阵元数目少、估计卫星信号来向有困难的应用场景。Many anti-jam techniques for GPS rely on the direction-of-arrival（DOA） of the satellite signals.When the DOA of the satellite signals is difficultly estimated,these above algorithms will fail to work.By utilizing subspace projection,this paper proposes a new anti-jamming algorithm for conventional multi-beam forming.In this present approach,the jammer components are first removed from the received data by subspace projection technique,and then in the fixed directions,several main lobes are formed via the conventional beamforming（CBF） method.Finally,the jammer-free data obtained from each beam are utilized to capture satellites and obtain a position.The main feature of the present approach is to not require the DOA of the satellites.Moreover,there is a certain gain in the signal direction.Hence,the proposed algorithm is suitable for the scenarios with fewer antenna elements and difficulty in the estimate of the DOA of the signals.

关 键 词：抗干扰 GPS 子空间投影 常规波束形成(CBF) 

分 类 号：TN9[电子电信—信息与通信工程]