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基于子空间技术的常规多波束形成抗干扰算法
王磊
作者单位E-mail
王磊 中国民航大学 wanglei@cauc.edu.cn 
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。本文给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。
关键词:  抗干扰  GPS  子空间投影  常规波束形成
DOI:
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基金项目: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)项目;国家高技术研究发展计划(863计划)
Anti-jamming Algorithm of Conventional Multi-Beam Forming Based on Subspace Technique
wanglei
Abstract:
Several anti-jam techniques for GPS rely on the direction-of-arrival (DOA) of the satellite signals. When there are difficulties to estimate the DOA of the satellite signals, these algorithms will fail. In this paper, an anti-jamming algorithm of conventional multi-beam forming is proposed. This approach is based on the subspace projection techniques, which first remove the jammer components from the received data by subspace projection technique, and then in the fixed directions, several main lobes is formed using the conventional beamforming (CBF) method. The jammer-free data obtained from each beam is then utilized to capture satellites and obtain a position. The approach is characterized by do not need to know the DOA of the satellites and there is a certain gain in the signal direction, which is suitable for the scenarios that difficult to estimate the DOA of the signals with small number of antenna elements.
Key words:  anti-jammer  GPS  subspace projection  CBF

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