基于中心对称圆阵的不相关源和相干源的DOA估计

基于中心对称的圆阵,提出了一种针对不相关源和成对相干源的波达方向(DOA)估计方法.这是一种分两步估计的方法,首先利用阵列流形的唯一性条件估计出不相关源;然后通过构造中心对称的阵列流形来去除不相关源的干扰,同时达到去除成对相干源相干性的目的.这种方法简单有效,由于直接在阵元空间进行估计而不需要进行波束变换,因此具有较高的估计精度.仿真实验结果验证了该方法的有效性.

DOA estimation for uncorrelated and coherent signals With centre-SVmmetrlC circUlar array

A new direction of arrival(DOA)estimation method for the centre-symmetric circular array is proposed to cope with the scenario where both uncorrelated signals and pairs of coherent signals are presented.By constructing a centre-symmetric array manifold and exploiting its properties,coherent signals in pairs can be decorrelated and then estimated without the interference of uncorrelated signals,while the uncorrelated signals are estimated by utilizing the uniqueness condition of array manifold.The two-stage estimation method is simple but effective.It does not need beamspace transform and is performed directly in element space.It has higher estimation precision.Simulation results demonstrate the effectiveness and efficiency of the proposed method.