在传统的多单元共点构成的电磁矢量天线中,一种经典且有效的算法是通过叉积运算估计入射信号的坡印廷矢量,进而得到入射信号的到达角(Direction of Arrival,DOA)参数.为了降低共点天线单元之间互耦和简化天线结构,文献中提出了空间分离...在传统的多单元共点构成的电磁矢量天线中,一种经典且有效的算法是通过叉积运算估计入射信号的坡印廷矢量,进而得到入射信号的到达角(Direction of Arrival,DOA)参数.为了降低共点天线单元之间互耦和简化天线结构,文献中提出了空间分离矢量天线阵列.针对空间分离矢量天线阵列,分析了电场和磁场分量实部和虚部的多种叉积运算组合,发现传统的叉积算法只是众多组合情况之一.利用其他叉积组合实现了DOA参数的估计,多种叉积运算的组合还能够提高DOA估计精度,同时也得到了新的空间分离矢量天线阵列结构.仿真验证了算法的正确性和有效性.展开更多
针对窄带和宽带两种情形,提出了一种基于同点正交磁环偶极子矢量天线(Co-centered orthogonal loop and dipole,COLD)阵列的联合稀疏重构信号波达方向(Direction-of-arrival,DOA)估计方法。该方法首先构造极化-空间域协方差矩阵,并对其...针对窄带和宽带两种情形,提出了一种基于同点正交磁环偶极子矢量天线(Co-centered orthogonal loop and dipole,COLD)阵列的联合稀疏重构信号波达方向(Direction-of-arrival,DOA)估计方法。该方法首先构造极化-空间域协方差矩阵,并对其第一列进行稀疏表示,在此基础上利用COLD阵列可视为相互垂直的磁环阵列和偶极子阵列这一特点,采用l2-范数约束下的凸优化(l1-范数)联合稀疏重构技术实现信号DOA估计。仿真实验表明,该方法较之现有方法具有分辨力高、估计精度高等优点。展开更多
A novel decorrelating DOA estimation algorithm of multipath signals for CDMA frequency selective fading channels based only on the principal eigenvector of its corresponding covariance matrix is proposed. The propose...A novel decorrelating DOA estimation algorithm of multipath signals for CDMA frequency selective fading channels based only on the principal eigenvector of its corresponding covariance matrix is proposed. The proposed algorithm has the advantages that the DOAs of the multipath signals can be estimated independently and all the other resolved multipath signal interference is eliminated. Simulation results show that this algorithm estimates the DOAs of multipath signals efficiently and accurately.展开更多
文摘在传统的多单元共点构成的电磁矢量天线中,一种经典且有效的算法是通过叉积运算估计入射信号的坡印廷矢量,进而得到入射信号的到达角(Direction of Arrival,DOA)参数.为了降低共点天线单元之间互耦和简化天线结构,文献中提出了空间分离矢量天线阵列.针对空间分离矢量天线阵列,分析了电场和磁场分量实部和虚部的多种叉积运算组合,发现传统的叉积算法只是众多组合情况之一.利用其他叉积组合实现了DOA参数的估计,多种叉积运算的组合还能够提高DOA估计精度,同时也得到了新的空间分离矢量天线阵列结构.仿真验证了算法的正确性和有效性.
文摘针对窄带和宽带两种情形,提出了一种基于同点正交磁环偶极子矢量天线(Co-centered orthogonal loop and dipole,COLD)阵列的联合稀疏重构信号波达方向(Direction-of-arrival,DOA)估计方法。该方法首先构造极化-空间域协方差矩阵,并对其第一列进行稀疏表示,在此基础上利用COLD阵列可视为相互垂直的磁环阵列和偶极子阵列这一特点,采用l2-范数约束下的凸优化(l1-范数)联合稀疏重构技术实现信号DOA估计。仿真实验表明,该方法较之现有方法具有分辨力高、估计精度高等优点。
文摘A novel decorrelating DOA estimation algorithm of multipath signals for CDMA frequency selective fading channels based only on the principal eigenvector of its corresponding covariance matrix is proposed. The proposed algorithm has the advantages that the DOAs of the multipath signals can be estimated independently and all the other resolved multipath signal interference is eliminated. Simulation results show that this algorithm estimates the DOAs of multipath signals efficiently and accurately.
