| 摘要: |
| 在高动态条件下，提高导航系统对快速变化干扰的抗干扰能力极其重要。为此，提出采用零陷展宽的方法对抗干扰算法进行改进，通过对干扰零陷进行加宽，增大算法抑制角度的范围，进而提高算法的高动态适应性。首先根据接收数据求解协方差矩阵，然后根据干扰扰动参数求出扩展矩阵，对协方差矩阵进行扩展更新，最后基于功率倒置抗干扰算法代入求解权矢量。实验仿真结果表明，所提算法相比于传统的功率倒置算法，干扰零陷明显展宽，输出干噪比更小，抗干扰性能得到较大改善。 |
| 关键词: 全球卫星导航系统 导航接收机；高动态适应性 抗干扰能力 零陷展宽；功率倒置算法 |
| DOI： |
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| 基金项目: |
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| An anti-interference null widening algorithm for navigation receiver in high dynamic environment |
| YAN Dashuang,NI Shuyan,LIAO Yurong |
| (Graduate School,Space Engineering University;Department of Electronic and Optical Engineering,Space Engineering University) |
| Abstract: |
| Under high dynamic conditions,it is extremely important to improve the anti interference ability of the navigation system against fast changing interference.For this reason,it is proposed to improve the anti interference algorithm by adopting the method of nulling widening.By widening the interference nulling,the range of the algorithms suppression angle is enlarged,and the high dynamic adaptability of the algorithm is improved.First,the covariance matrix is solved according to the received data,and then the expansion matrix is obtained according to the interference disturbance parameters,and the covariance matrix is expanded and updated.Finally,based on the power inversion anti interference algorithm,it is substituted into the solution weight vector.The experimental simulation results show that compared with the traditional power inversion algorithm,the proposed algorithm has obvious expansion of the interference null,the output interference to noise ratio of the algorithm is smaller,and the anti interference performance of the algorithm is greatly improved. |
| Key words: global navigation satellite system navigation receiver high dynamic adaptability anti interference ability null widening power inversion algorithm |
