基于遗传算法的宽带加权子空间拟合测向算法

Wide-Band Weighted Sub-Space Fitting Direction Finding Algorithm Based on Genetic Algorithm

宽带信号测向一直是信号处理领域研究的难点 .本文把窄带情形下的加权子空间拟合测向算法推广到宽带情形 ,构造了一个目标函数 ,然后应用遗传算法进行非线性全局优化 ,即可得到波达方向估计值 ,同时避免了对入射方向进行预估计 .把本文算法应用到均匀线阵上 ,仿真实验结果证明了算法的有效性 .

Wide-band direction finding is a difficult topic of research in signal processing domain. This paper generalizes weighted sub-space fitting direction finding algorithm to the wideband situation, and so constructs an aim function, then applies genetic algorithm for nonlinear global optimization. Direction of arrival is estimated without preprocessing. The algorithm is applied on uniform linear array and extensive simulation results demonstrate that the algorithm has good performance.