基于二维MUSIC算法的干扰信号来向估计FPGA实现

FPGA implementation of interference signal arrival estimation based on 2D-MUSIC algorithm

空间干扰信号来向估计算法实现过程复杂、理论研究相对不成熟等导致多数算法仍停留在理论研究阶段。针对此问题,采用在FPGA上实现典型的信号来向估计算法——二维MUSIC算法。介绍了二维MUSIC算法的算法模型和实现步骤,给出了二维MUSIC算法在FPGA上的实现方式。简要阐述了特征值分解模块的实现思想,重点分析了空间谱计算和谱峰搜索模块的处理流程和计算方法。仿真分析结果表明,选择角度精度为5°时,二维MUSIC算法在FPGA上实现后的仿真和实际测试中的角度误差均在5°范围内,满足导航抗干扰对角度的估计性能。

The space interference signal direction estimation algorithm is complicated to implement,and the theoretical research is relatively immature,so that most of the algorithms are still at the stage of theoretical research.In response to this problem,a typical signal estimation algorithm—two-dimensional MUSIC algorithm—was implemented on FPGA.The algorithm model and implementation steps of the two-dimensional MUSIC algorithm are introduced;The implementation of the two-dimensional MUSIC algorithm on FPGA is given.The realization of the eigenvalue decomposition module is briefly explained,and the processing flow and calculation method of the spatial spectrum calculation module and spectrum peak search module are analyzed.The simulation analysis results show that when the angle accuracy is 5°,the angle error in the simulation and actual test of the two-dimensional MUSIC algorithm implemented on the FPGA is within 5°,which meets the navigation anti-jamming performance of angle estimation.