基于共轭梯度法的空时抗干扰算法研究  

Time Difference Location Method Using Two Planes Realized by Single-Base Midpoint DF

作　　者：罗强 牛曦辰 LUO Qiang;NIU Xichen

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068 [2]陕西省组合与智能导航重点实验室,西安710068 [3]陕西交通职业技术学院,西安710018

出　　处：《现代导航》2024年第2期102-106,共5页Modern Navigation

摘　　要：由于卫星导航信号功率很小,所以卫星导航信号具有易受干扰的特点,目前卫星导航抗干扰算法主要用到的是协方差矩阵求逆的方法,比如空域和空时抗干扰算法,然而随着天线阵元数的增加和空时抽头数的增加,矩阵维数也随之增加,导致运算量的上升,而共轭梯度法可以避免高维矩阵求逆,且具有收敛快,计算量小的特点,因此基于共轭梯度法的求解空时抗干扰算法,并通过仿真分析证明所提方法的有效性。Since the power of satellite navigation signals is very low,satellite navigation signals are susceptible to interference.Currently,satellite navigation anti-interference algorithms mainly use the method of inverting the covariance matrix,such as space,space-time and space-frequency anti-interference algorithms.However,as the number of antenna array elements,the number of space-time taps,and the frequency points of the space-frequency algorithm increase,the matrix dimension also increases,resulting in an increase in the amount of calculations.The conjugate gradient method can avoid the inversion of high-dimensional matrices.It has the characteristics of fast convergence and small amount of calculation.Therefore,the space-time anti-interference algorithm are studied based on the conjugate gradient method,and the effectiveness of the proposed method is proved through simulation analysis.

关 键 词：卫星导航 空时抗干扰算法 共轭梯度法 功率倒置算法 

分 类 号：TN953[电子电信—信号与信息处理]