CAJ | 학술논문

相干信号的波达方向(direction of arrival,DOA)估计一直是阵列信号处理中研究的关键问题,但传统的算法受到阵列流型的限制.为了解决任意平面阵列对二维相干信号的DOA估计问题,提出了一种新的方法.首先利用信号的循环平稳特性构造数据协方差矩阵,再利用信号在极化域的差异来实现解相干.该方法具有噪声抑制的能力,无需空间平滑,不影响阵列孔径,并且对窄带信号和宽带信号均适用.仿真结果证明了该算法的有效性.
상간신호적파체방향(direction of arrival,DOA)고계일직시진렬신호처리중연구적관건문제,단전통적산법수도진렬류형적한제.위료해결임의평면진렬대이유상간신호적DOA고계문제,제출료일충신적방법.수선이용신호적순배평은특성구조수거협방차구진,재이용신호재겁화역적차이래실현해상간.해방법구유조성억제적능력,무수공간평활,불영향진렬공경,병차대착대신호화관대신호균괄용.방진결과증명료해산법적유효성.
DOA (direction of arrival) estimation of coherent signals is an important content in array signal processing,but the traditional algorithm is usually confined by the array manifold.In order to solve the problem of two dimensions DOA estimation for coherent signals with arbitrary plane array,a new algorithm is proposed.The corresponding correlation matrix is constructed using the characteristics of cyclostationary signals,then the coherence is solved using the difference in polarization.The proposed method can suppress noises does not need spatial smoothing,does not affect the aperture of the sensor array,and can be employed to both narrowband and wideband cases.Computer simulation results prove the effective performance of the method.