一种冲击噪声下相干分布源多峰DOA估计方法  

A Multimodal DOA Estimation Method of Coherently Distributed Sources in Impulse Noise

作　　者：高洪元[1] 刘亚鹏 杜亚男 程建华 孙贺麟 GAO Hong-yuan;LIU Ya-peng;DU Ya-nan;CHENG Jian-hua;SUN He-lin(College of Information and Communication Engineering,Harbin Engineering University,Harbin,Heilongjiang 150001,China;College of Intelligent Systems Science and Engineering,Harbin Engineering University,Harbin,Heilongjiang 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学智能科学与工程学院,黑龙江哈尔滨150001

出　　处：《电子学报》2023年第9期2330-2340,共11页Acta Electronica Sinica

基　　金：国家自然科学基金(No.62073093);黑龙江省自然科学基金(No.LH2020F017);黑龙江省博士后科研启动金(No.LBH-Q19098)。

摘　　要：针对现有相干分布源波达方向(Direction Of Arrival,DOA)估计方法计算量大、抗冲击噪声能力弱和不能有效去相干等难题,本文提出了一种冲击噪声下相干分布源多峰DOA估计方法,并推导了冲击噪声下相干分布源DOA估计的克拉美罗界.为了实现冲击噪声下相干分布源DOA估计,采用加权范数协方差抑制冲击噪声,进而首次推导出多峰加权信号子空间拟合方程,并设计了一种多峰量子秃鹰算法快速无量化误差求解.仿真结果表明,所提方法在冲击噪声下能够以较小的快拍数实现相干分布源DOA估计,且无需额外的解相干操作即可有效去相干.与一些已有的高精度DOA估计方法相比,所提方法仿真时间明显缩短,且具有更高的估计精度和估计成功概率,突破了已有相干分布源DOA估计方法的应用局限,可推广应用于其他复杂的DOA估计问题中.To address the problems of the existing direction of arrival(DOA)estimation methods of coherently distributed sources,such as huge computational complexity,inferior performance in impulse noise and ineffective decoherence ability,a multimodal DOA estimation method of coherently distributed sources in impulse noise is proposed and the Cramér-Rao bound is derived for DOA estimation of coherently distributed sources in the impulse noise.A multimodal weighted signal subspace fitting equation,employing the weighted norm covariance,is derived firstly to achieve the DOA estimation of coherently distributed sources in the impulse noise,meanwhile,a multimodal quantum bald eagle algorithm is designed to quickly solve the derived equation without quantization error.Simulation results show that the proposed method can achieve the DOA estimation of coherently distributed sources with a small number of snapshots in the impulse noise,and can locate coherent sources without additional decoherence operations.Compared with the existing high precision DOA estimation methods,the proposed method has shorter simulation time and higher estimation accuracy and successful rate,which breaks through the application limitations of the existing coherently distributed source DOA estimation methods and can be popularized and applied in other complex DOA estimation problems.

关 键 词：相干分布源 DOA估计 冲击噪声 多峰加权信号子空间拟合 多峰量子秃鹰算法 克拉美罗界 

分 类 号：TN911.7[电子电信—通信与信息系统]