| 基于子空间投影波束形成技术的导航接收机抗干扰算法研究 |
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| 引用本文： | 关刚强,聂俊伟,黄仰博,王飞雪.基于子空间投影波束形成技术的导航接收机抗干扰算法研究[J].国防科技大学学报,2016,38(2). |
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| 作者姓名： | 关刚强 聂俊伟 黄仰博 王飞雪 |
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| 作者单位： | 国防科技大学电子科学与工程学院卫星导航定位技术与工程研究中心,国防科技大学电子科学与工程学院卫星导航定位技术与工程研究中心,国防科技大学电子科学与工程学院卫星导航定位技术与工程研究中心,国防科技大学电子科学与工程学院卫星导航定位技术与工程研究中心 |
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| 基金项目： | 教育部新世纪人才支持计划（NCET-08-0144） |
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| 摘 要： | 阵列天线空时自适应处理通过联合空域和时域的自适应滤波处理技术能够有效提高导航接收机的窄带和宽带干扰抑制性能。利用导航信号淹没在干扰信号和热噪声的特点，本文提出先将天线阵列接收的空时信号矢量向干扰子空间的正交子空间投影以实现干扰抑制，当接收机对投影后的参考阵元数据捕获成功后，利用捕获估计的本地扩频码相位作为参考信号依据最小均方误差准则进行波束形成。仿真结果表明该抗干扰算法在零陷强干扰的同时使主波束指向导航信号来波方向，有效提高了阵列输出信干噪比，并降低了空时自适应处理对导航信号伪码相关峰形状和载波跟踪性能的影响。
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| 关 键 词： | 抗干扰 子空间投影 波束形成 导航接收机 |
| 收稿时间： | 3/6/2015 12:00:00 AM |
A study of anti-jamming algorithm in GNSS receiver utilizing subspace projection and beamforming |
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| Abstract: | Space-time adaptive processing (STAP) using antenna array combines the benefits of spatial domain and time domain adaptive filters, which can effectively improve the ability of narrowband and broadband interferences suppression in the GNSS receiver. Considering that the GNSS signal is buried in the strong interference and thermal noise, a novel anti-jamming scheme which utilizes subspace projection and beamforming method is proposed in this paper. Firstly the data vector received by antenna array is projected onto the noise subspace which is orthogonal to interference subspace to achieve interference suppression. When the local code is synchronized with the reference antenna jammer-free data, beamforming is performed according to the minimum mean square error (MMSE) criterion. Simulation results show that the proposed method can steer the main beam to the direction of GNSS signal wave with effective interference suppression, and the output signal-to-noise ratio (SINR) can be significantly increased while the correlation peak curve and the carrier tracking performance are not corrupted. |
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| Keywords: | anti-jamming subspace projection beamforming GNSS receiver |
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