基于空时联合抗干扰算法的复矩阵求逆  

Matrix Inversion Implementation Based on Joint Space-Time Anti-jamming Algorithm

作　　者：董李梅[1] 

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《电讯技术》2015年第7期792-796,共5页Telecommunication Engineering

摘　　要：针对卫星导航接收机易被干扰的特点,研究了空时联合抗干扰算法,并提出了一种简化的复正定厄米矩阵求逆实现方法。首先,给出了空时联合抗干扰算法的基本模型。随后,在详细分析传统复正定厄米矩阵求逆算法基础上,给出了改进的复正定厄米矩阵求逆方法的具体步骤。最后,基于数字信号处理(DSP)的硬件平台,对运算量进行了对比分析。仿真结果表明,改进的复正定厄米矩阵求逆方法加法和乘法运算量都大幅度降低,比传统算法运算速度加快了三分之一。算法简单可靠,易于实现,适用于工程应用中实时性要求较高的场合。For the shortcoming that the satellite navigation receiver is easy to be interfered,a joint space-time method is researched and an improved complex Hermitian positive definite matrix inversion method is proposed based on matrix inversion part. First,the joint space-time method is presented. Second,according to the analysis of the traditional Hermitian positive definite matrix inversion method,an improved method is proposed,and the detailed process is given. Finally,the computations of addition,multiplication,division are compared based on Digital Signal Processing( DSP) hardware platform. Simulation results show that the computation of the improved method is significantly reduced. The improved method is simple,reliable,and easy to implement and can be applied in engineering applications where real-time requirement is strict.

关 键 词：卫星导航接收机 空时联合抗干扰 矩阵求逆 功率倒置算法 

分 类 号：TN973[电子电信—信号与信息处理]