航空学报 > 2013, Vol. 34 Issue (6): 1414-1423   doi: 10.7527/S1000-6893.2013.0070

基于Kalman滤波的GPS/INS接收机自适应干扰抑制方法

王纯1, 张林让2, 罗丰2   

  1. 1. 西安建筑科技大学信息与控制工程学院, 陕西 西安 710055;
    2. 西安电子科技大学雷达信号处理国防重点实验室, 陕西 西安 710071
  • 收稿日期:2012-07-26 修回日期:2013-01-04 出版日期:2013-06-25 发布日期:2013-01-15
  • 通讯作者: 王纯, Tel.: 029-88480106 E-mail: wangchun01@126.com E-mail:wangchun01@126.com
  • 作者简介:王纯 女, 博士, 讲师。主要研究方向: 阵列信号处理, GPS接收机抗干扰方法研究等。 Tel: 029-88480106 E-mail: wangchun01@126.com;张林让 男, 博士, 教授, 博士生导师。主要研究方向: 阵列信号处理, 方向图综合, 自适应滤波方法等。 Tel: 029-88203023 E-mail: lrzhang@xidian.edu.cn;罗丰 男, 博士, 教授, 硕士生导师。主要研究方向: 高速实时信号处理与检测, 自适应信号处理, 数字系统设计与大规模可编程器件应用。 Tel: 029-88201031 E-mail: luofeng@xidian.edu.cn
  • 基金资助:

    陕西省教育厅科研计划(12JK1007);西安建筑科技大学校青年科技基金(QN1235)

Adaptive Interference Suppression Method Based on Kalman Filter in GPS/INS Receiver

WANG Chun1, ZHANG Linrang2, LUO Feng2   

  1. 1. School of Information and Control Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
    2. National Key Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China
  • Received:2012-07-26 Revised:2013-01-04 Online:2013-06-25 Published:2013-01-15
  • Contact: 10.7527/S1000-6893.2013.0070 E-mail:wangchun01@126.com
  • Supported by:

    Scientific Research Program Funded by Shaanxi Provincial Education Department (12JK1007); Xi'an University of Architecture and Technology Youth Sience and Technology Fund (QN1235)

摘要:

考虑到惯导信息辅助GPS(GPS/INS)接收机对干扰抑制实时性的要求,提出一种基于Kalman滤波的GPS/INS接收机自适应干扰抑制方法。自适应广义旁瓣相消(GSC)多采用低复杂度最小均方(LMS)算法更新权矢量,收敛速率较低,严重时会导致接收机定位中断。首先利用Householder变换构建GSC下支路的阻塞矩阵,用于阻塞任意二维阵型阵列接收的期望信号;再用Kalman滤波自适应更新下支路权矢量,从而有效提高阵列输出信干噪比(SINR)。理论分析和仿真结果说明本文方法可有效抑制干扰对接收机的影响,且具有实时性高的特点。

关键词: 惯导信息辅助GPS接收机, Householder变换, 广义旁瓣相消, 干扰抑制, Kalman滤波

Abstract:

Considering the real-time requirement of interference suppression in INS-assisted GPS (GPS/INS) receiver, a novel adaptive interference suppression approach for the GPS/INS receiver is presented based on the Kalman filter.An adaptive generalized sidelobe canceller (GSC) always employs the least-mean-square (LMS) algorithm for weight adaptation due to the lower complexity, but its convergence rate is lower and even make the receiver interrupt in severe cases. First, Householder transformation is employed for the design of the blocking matrix of the GSC, which can block desired signal received by an arbitrary planar array type. Then, update the adaptive weight on the low path by the Kalman filter, which exhibits great advantage for the output signal-to-interference-noise ratio (SINR). Theoretical analysis and simulation results demonstrate that the proposed method can effectively suppress the impact of interference on the receiver,and improve real-time characteristics of interference mitigation.

Key words: GPS/INS receiver, Householder transformation, generalized sidelobe canceller, interference suppression, Kalman filter

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