增元通道增益不一致情况下一种新的DOA快速估计算法

A novel approach to fast DOA estimation with sensor gain and phase perturbations

提出一种在阵元通道增益不一致情况下多个空间窄带信号波达方向(DOA)的快速估计算法。与传统DOA估计算法完全不同,该算法通过对阵列输出数据的快速傅立叶变换(FFT),建立了FFT频谱与波达方向角的关系;利用这一关系并通过对FFT谱峰的搜索,从而实现了对波达方向的快速估计。讨论接收阵列阵元通道增益不一致对算法的影响,计算机模拟实验验证了算法的可行性。

A novel approach, which is totally different from the traditional methods, for estimating directions-of-arrival (DOA) of multiple spatial narrow-band signals is presented in this paper. Based on fast Fourier transforms (FFT) of the sensor array output data, a relationship between the FFT spectrum and direction-of-arrival angles is established so that the angles can quickly be estimated through searching peaks in the FFT spectrum. In addition, the performance of the proposed approach with sensor gain and phase perturbations is also discussed. Computer simulations confirm the availability of the proposed approach.