| 基于GPS码信号跟踪的空时自适应处理算法 |
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| 引用本文： | 周晓霞,李康吉,施维.基于GPS码信号跟踪的空时自适应处理算法[J].江苏大学学报(自然科学版),2007,28(4):332-335. |
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| 作者姓名： | 周晓霞 李康吉 施维 |
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| 作者单位： | 江苏大学,电气信息工程学院,江苏,镇江,212013 |
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| 摘 要： | 介绍了GPS码信号的模型,以及实时白化和扩展卡尔曼滤波的工作原理.提出了一种改进的空时自适应处理算法,运用该算法能够使GPS接收机抑制射频干扰、精确跟踪并使捕获码信号的性能得到提高.射频干扰中含有宽带干扰和窄带干扰,窄带干扰用自回归过程来模拟并通过实时白化得到抑制,宽带干扰通过空间零陷得到抑制.空间零陷是通过估计一个采样的协方差矩阵,并把它求逆,然后输入卡尔曼滤波器来实现的.通过计算机仿真证实了在严重的干扰情况下该算法的鲁棒性,以及优于码跟踪环的性能.
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| 关 键 词： | 全球定位系统 空时自适应 GPS码信号 抑制干扰 扩展卡尔曼滤波 信号跟踪 空时自适应 处理算法 code tracking algorithm processing 码跟踪环 鲁棒性 情况 窄带干扰 严重 算机仿真 卡尔曼滤波器 输入 求逆 协方差矩阵 采样 估计 零陷 |
| 文章编号： | 1671-7775（2007）04-0332-04 |
| 修稿时间： | 2006-10-26 |
Space-time adaptive processing algorithm for tracking GPS code |
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| ZHOU Xiao-xia,LI Kang-ji,SHI Wei.Space-time adaptive processing algorithm for tracking GPS code[J].Journal of Jiangsu University:Natural Science Edition,2007,28(4):332-335. |
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| Authors: | ZHOU Xiao-xia LI Kang-ji SHI Wei |
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| Institution: | School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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| Abstract: | A space-time adaptive processing algorithm for delay tracking and acquisition of GPS signal with interference rejection capability is developed.The interference consists of both broadband and narrowband.The narrowband interferences are modeled as vector autoregressive processes and rejected by temporal whitening.The spatial nulling is implicitly achieved by estimating a sample covariance matrix and feeding its inverse into the extended Kalman filter.Computer simulations demonstrate the performance capability of the algorithm during severe jamming.GPS;space-time adaptive;GPS signal;interference rejection;extended Kalman filter |
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| Keywords: | GPS space-time adaptive GPS signal interference rejection extended Kalman filter |
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