一种新颖的快速DOA估计算法

一次快拍空间FFT法运算量小,但抗噪声性能较差,易形成伪峰;多次平滑FFT法充分利用阵列多次快拍的所有数据,具有较好的抗噪声性能,抑制了伪峰的形成,但运算量较大。提出了自相关阵平滑空间FFT算法,其性能优于现有的自相关阵单列FFT,与多次平滑FFT法相当且易于实现,运算量较小。理论分析与仿真实验证明了该算法的有效性。

A novel algorithm for fast DOA estimation

Spatial FFT algorithm with the data of one snapshot offers a small computation burden but worse noise suppression performance and incident pseudo peaks.Smoothing algorithm with N FFTs which makes good use of all data from snapshots of array has the better suppression performance to noise and pseudo peaks but larger computation burden.The smoothing algorithm with self-correlation matrix is proposed.Its performance is better than the existing FFT algorithm of one single list in self-correlation matrix.The algorithm is easy to operate with smaller computation burden.The theoretical analysis and simulation results demonstrate that the algorithm is effective.