快时变场景下卫星导航接收机抗宽带干扰算法的研究

项目名称： 快时变场景下卫星导航接收机抗宽带干扰算法的研究

项目编号： No.61201199

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 龚文飞

作者单位： 北京交通大学

项目金额： 25万元

中文摘要： 针对功率倒置空时抗干扰算法性能低和传统线性约束空时抗干扰算法运算大的问题，在未知卫星信号来向信息的前提下，本项目以机载/弹载抗干扰卫星导航应用终端为实验平台，深入研究快时变场景下空时自适应处理盲干扰抑制算法，具体研究内容如下： （1）多个单约束并行的空时自适应处理盲干扰抑制算法：结合接收机的快速捕获和稳定跟踪单元，研究基于卫星信号盲搜索和角度稳定跟踪的多个单约束并行空时自适应处理抗干扰算法； （2）自适应对角加载空时自适应处理盲干扰抑制算法：研究小快拍情况下基于线性约束最小方差准则的空时自适应处理盲干扰抑制算法性能下降的问题，提出一种自适应对角加载空时自适应处理盲干扰抑制算法。 （3）自适应降维空时自适应处理盲干扰抑制算法：在保证滤波性能条件下，为了进一步降低算法的运算量，提出基于改进盖氏圆算法的自适应降维空时自适应处理盲干扰抑制算法。

中文关键词： 卫星导航系统；抗干扰；快时变；空时自适应处理算法；多级嵌套维纳滤波

英文摘要： To improve the performance of the anti-jamming method of traditional power inversion space-time adaptive processing and to reduce the computational burden of traditional linearly constrained minimum variance (LCMV) space-time adaptive processing, an improved blind interference reduced-rank space-time adaptive processing beamforming algorithm is proposed for fast search of satellites without the direction knowledge of desired satellites.Under the background of developing the plane and bomb anti-jamming satellite navigation position receiver, this dissertation conducts deep researches on the key anti-jamming technologies of satellite navigation position receivers. The main contents of the dissertation are concluded as follows: (1) A parallel multi-beam blind interference reduced-rank space-time adaptive processing beamforming algorithm is proposed. The parallel multi-beam space-time adaptive processing beamforming algorithm based on the blind search and angle tracking of satellite signal in combination of the fast acquistion and steady tracking module. (2) An adaptive diagonal loading blind interference reduced-rank space-time adaptive processing beamforming algorithm is proposed.To solve the problem of space-time adaptive processing (STAP) performance degradation due to small sample support, a novel method of ad

英文关键词： satellite navigation system；anti-jamming；fast time-varying；space-time adaptive processing；multistage nested Wiener filter