辐射源测向仿真研究

Simulation research on radiation source direction finding

为提高相位干涉法在测向定位中的精度,通过设置理想和模拟实验环境,对固定站不均匀阵列辐射源测向中的传统相位干涉算法和多基线时域干涉最小二乘方法进行了误差分析。针对2种方法在不同信噪比下的适用性进行了仿真研究,并基于3-sigma原则和直接求均值法对误差进行了进一步消除。实验结果表明,在多信号干扰叠加和高频振荡信号混频的环境中,最小二乘方法的收敛性优于传统方法,定位误差小于1%。同时,3-sigma准则误差消除的效果优于直接求均值法。

To improve the accuracy of phase interferometry in direction finding and positioning,error analysis was conducted on the traditional phase interferometry algorithm and multi baseline timedomain interferometry least squares method in fixed station non-uniform array radiation source direction finding by setting up ideal and simulated experimental environments.We conducted simulation studies on the applicability of two methods under different signal-to-noise ratios,and further eliminated errors based on the 3-sigma principle and the direct mean method.The experimental results show that in the environment of multiple signal interference superposition and high-frequency oscillation signal mixing,the convergence of the least squares method is better than traditional methods,and the positioning error is less than 1%.Meanwhile,the error elimination effect of the 3-sigma criterion is better than that of the direct mean method.