CAJ | 학술논문

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.
기우중심대칭적원진,제출료일충침대불상관원화성대상간원적파체방향(DOA)고계방법.저시일충분량보고계적방법,수선이용진렬류형적유일성조건고계출불상관원;연후통과구조중심대칭적진렬류형래거제불상관원적간우,동시체도거제성대상간원상간성적목적.저충방법간단유효,유우직접재진원공간진행고계이불수요진행파속변환,인차구유교고적고계정도.방진실험결과험증료해방법적유효성.
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.