用于GPS接收机的快速自适应干扰抑制方法  

Fast adaptive interference suppression method in the GPS receiver

作　　者：王纯[1] 张林让[1] 陈广锋[1,2] 黄庆东[1,3] 刘高高[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 [2]西安文理学院数学系,陕西西安710065 [3]西安邮电学院通信工程系,陕西西安710121

出　　处：《西安电子科技大学学报》2011年第3期114-120,共7页Journal of Xidian University

基　　金：国家高技术研究发展计划资助项目(2009AA12Z303);国家自然科学基金资助项目(60672130);重点实验室基金资助项目(0303072209)

摘　　要：提出了一种基于Householder变换的快速自适应干扰抑制方法.利用Householder变换构建的广义旁瓣相消器下支路阻塞矩阵,可将期望信号完全阻塞,提高了最小均方误差算法的收敛性,获得了较高的输出信干噪比,并提高了GPS接收机的快速抗干扰性能.理论分析和性能仿真验证了该方法的优越性.The adaptive Generalized Sidelobe Canceller（GSC） always employs the least-mean-square（LMS） algorithm for weight adaptation. In the GPS receiver, real adaptive interference suppression can not be satisfied by this algorithm because of its slow convergence rate, especially at the very low signal-to-noise ratio（SNR）. Since the convergence behavior of the LMS algorithm is highly dependent on the eigenvalue spreads of the covariance matrix of the blocking matrix output, we present a novel Householder-based fast adaptive interference suppression approach. Householder transformation can be employed for the design of the blocking matrix of the GSC, which will block not only the desired signal but also accelerate the convergence rate of the LMS algorithm. Therefore, it can also maximize the output SINR and significantly improve the performance of the anti-jammer GPS receiver. Theoretical analysis and simulation results demonstrate the superiority of the proposed structure. m

关 键 词：GPS接收机 Householder变换 广义旁瓣相消 最小均方误差算法 

分 类 号：N965[自然科学总论] TN911.7[电子电信—通信与信息系统]