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基于互质阵列重构的高维波达方向估计算法 预览

Direction-of-Arrival Destimation for Multiple Sources Based on the Reconstruction of the Coprime Array
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摘要 针对角度估计中现有算法估计信源数少的问题,提出了一种基于互质阵列重构的高维波达方向估计算法,实现了有限物理阵元条件下多重信号角度的超分辨估计.该方法首先对接收信号协方差矩阵进行列向量化处理,建立虚拟阵列模型,然后在此基础上重构虚拟阵列流型,拟合出缺失的虚拟阵元响应,最后引入空域平滑的思想,实现角度的超分辨估计.对本文算法的复杂度和阵列自由度进行理论分析.仿真结果表明,所提方法在相同物理阵元数条件下阵列自由度高于连续空域平滑检测算法和迭代内插检测算法,相比于迭代内插检测算法,以较小的复杂度代价获得了性能的较大提高. Direction-of-arrival(DOA)estimation is a research hotspot in wireless location.To deal with the lack of the array freedom,this paper presents a coprime array with a high degree of freedom based on the reconstruction of virtual array,realized the super-resolution estimation of multi received angles.This algorithm first vectors the received signal covariance matrix to build the virtual structure model with coprime array,and then,to fit out the lack virtual array response,this paper reconstruct the virtual array,finally,the spatial smoothing is used to realize the super resolution angle estimation.The complexity of the algorithm and the degree of freedom of the array are analyzed in theory detailedly.The simulation results show that the proposed method has a higher array degree of freedom than that of continuous spatial smoothing detection algorithm and the iterative interpolation algorithm under the condition of a same physical element,compared to the iterative interpolation algorithm,the performance of the algorithm is improved greatly with a slightly increased in complexity.
作者 张彦奎 许海韵 巴斌 逯志宇 代正亮 ZHANG Yan-kui;XU Hai-yun;BA Bin;LU Zhi-yu;DAI Zheng-liang(The PLA Information Engineering University,Zhengzhou,Henan 450001,China)
出处 《电子学报》 CSCD 北大核心 2018年第12期2923-2929,共7页 Acta Electronica Sinica
基金 国家自然科学基金(No.61401513).
关键词 互质阵列 虚拟阵列 自由度 超分辨 coprime array virtual array degree of freedom super resolution
作者简介 通信作者:张彦奎,男,1990年生,陕西西安人,博士生,研究方向阵列信号处理、无线定位等.E-mail:zhang_yk_2018@163.com;许海韵,男,1995年生,湖南怀化人,硕士生,研究方向为阵列信号处理、参数估计等;巴斌,男,1988年生,河南郑州人,博士,讲师,研究方向为阵列信号处理、参数估计,卫星与移动通信等;逯志宇,男,1989年生,河北秦皇岛人,博士,研究方向为移动通信、信号处理等;代正亮,男,1993年生,安徽马鞍山人,硕士生,研究方向为阵列信号处理、分布式信号处理等.
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