| 基于阵列天线波束形成的卫星导航信号提纯 |
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| 引用本文： | 史鹏亮,王晓宇,薛瑞.基于阵列天线波束形成的卫星导航信号提纯[J].北京航空航天大学学报,2022,48(10):1906-1914. |
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| 作者姓名： | 史鹏亮 王晓宇 薛瑞 |
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| 作者单位： | 1.北京航空航天大学 电子信息工程学院, 北京 100083 |
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| 基金项目： | 国家重点研发计划2017YFB0503400国家自然科学基金61803037 |
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| 摘 要： | 围绕对卫星导航信号实施转发式欺骗所需的卫星导航信号提纯要求，提出了一种数字波束形成的优化设计方法。通过向阵列天线接收信号的数据协方差矩阵加载由非目标卫星方向信息和阵列布局构造的“虚拟”干扰信号协方差矩阵，增大了协方差矩阵特征值的差异。用新构造的协方差矩阵计算最小方差无失真响应波束形成的加权向量，使波束指向方向的目标卫星信号无失真通过，并同时零陷其他非目标卫星的信号。通过计算机仿真试验验证了所提方法的正确性和有效性。
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| 关 键 词： | 卫星导航 阵列天线 提纯 波束形成 空域滤波 |
| 收稿时间： | 2021-01-22 |
Purification method of satellite navigation signal based on array antenna beamforming |
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| Affiliation: | 1.School of Electronics and Information Engineering, Beihang University, Beijing 100083, China2.Air Force Research Academy, Beijing 100085, China3.Department of Navigation, The 20th Research Institute of CETC, Xi'an 710072, China |
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| Abstract: | To satisfy the requirements of satellite navigation spoofing, a satellite navigation signals purification method is proposed based on the optimal design of the array digital beamforming. Firstly, a new covariance matrix is constructed and the disparity between the max eigenvalue and the minimum eigenvalue of the covariance matrix of the array received data is expanded by combing the direction information of non-object satellites, the layout information of the received array and the covariance matrix of the array received data. Secondly, the spatial filter weights that make the object satellite signal distortion-free while nullifying any non-object satellite signals are computed by using the constructed covariance matrix. At last, the purified satellite signals are obtained by weighting the array of received data. The correctness and effectiveness of the method proposed in this paper are validated by computer simulations. |
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