高动态环境下导航接收机抗干扰零陷展宽算法  

An Anti-interference Null Widening Algorithm for Navigation Receiver in High Dynamic Environment

作　　者：严大双 倪淑燕 廖育荣 YAN Dashuang;NI Shuyan;LIAO Yurong(a.Graduate School,Space Engineering University,Beijing 101400,China;Department of Electronic and Optical Engineering,Space Engineering University,Beijing 101400,China)

机构地区：[1]航天工程大学研究生院,北京101400 [2]航天工程大学电子与光学工程系,北京101400

出　　处：《电讯技术》2022年第11期1580-1586,共7页Telecommunication Engineering

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。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 algorithm s 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.

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 

分 类 号：TN973.3[电子电信—信号与信息处理]