利用稀疏阵列多输入多输出(multi-input and multi-output,MIMO)雷达的虚拟孔径扩展特性开展参数估计研究具有重要的理论意义和应用前景.本文以稀疏阵列MIMO雷达设计和参数估计为导向,以提高估计精度和降低运算量为落脚点,从子空间类和...利用稀疏阵列多输入多输出(multi-input and multi-output,MIMO)雷达的虚拟孔径扩展特性开展参数估计研究具有重要的理论意义和应用前景.本文以稀疏阵列MIMO雷达设计和参数估计为导向,以提高估计精度和降低运算量为落脚点,从子空间类和压缩感知类算法的契合点出发,围绕阵列设计、波达方向估计、角度联合估计等方面,构建了系统的稀疏阵列MIMO雷达参数估计理论.最后,从阵列优化设计、混合目标参数估计、非理想因素抑制和分布式平台搭建等方面展望了稀疏阵列MIMO雷达的发展趋势.展开更多
提出了基于2q阶累积量的非圆信号测向MUSIC(Multiple Signal Classification)算法(称为NC-2q-MUSIC),作为2q-MUSIC算法利用非圆信息的一种扩展,在可测向信号数、分辨力和测角精度等方面的性能均优于2q-MUSIC算法.并且,q越大,NC-2q-MUSI...提出了基于2q阶累积量的非圆信号测向MUSIC(Multiple Signal Classification)算法(称为NC-2q-MUSIC),作为2q-MUSIC算法利用非圆信息的一种扩展,在可测向信号数、分辨力和测角精度等方面的性能均优于2q-MUSIC算法.并且,q越大,NC-2q-MUSIC算法的可测向信号数越大,分辨力越高,对模型误差也越不敏感.针对均布线阵(ULA:Uniform Linear Array)提出的NC-2q-MUSIC/ULA算法减小了计算量.仿真实验验证了NC-2q-MUSIC算法的优良性能.展开更多
A two-dimensional direction-of-arrival(DOA) estimation method for non-uniform two-L-shaped array is presented in which the element spacing is larger than half-wavelength. To extract automatically paired low-variance c...A two-dimensional direction-of-arrival(DOA) estimation method for non-uniform two-L-shaped array is presented in which the element spacing is larger than half-wavelength. To extract automatically paired low-variance cyclically ambiguous direction cosines and high-variance unambiguous direction cosines from the sub-blocks, the proposed method constructs and partitions the cross-correlation matrices. Then, the low-variance unambiguous direction cosines are obtained using the ambiguity resolved technique. Simulation results demonstrate that the proposed method has lower computation complexity and higher resolution than the existing methods especially when the elevation angles are between 70 and 90 degrees.展开更多
文摘利用稀疏阵列多输入多输出(multi-input and multi-output,MIMO)雷达的虚拟孔径扩展特性开展参数估计研究具有重要的理论意义和应用前景.本文以稀疏阵列MIMO雷达设计和参数估计为导向,以提高估计精度和降低运算量为落脚点,从子空间类和压缩感知类算法的契合点出发,围绕阵列设计、波达方向估计、角度联合估计等方面,构建了系统的稀疏阵列MIMO雷达参数估计理论.最后,从阵列优化设计、混合目标参数估计、非理想因素抑制和分布式平台搭建等方面展望了稀疏阵列MIMO雷达的发展趋势.
文摘提出了基于2q阶累积量的非圆信号测向MUSIC(Multiple Signal Classification)算法(称为NC-2q-MUSIC),作为2q-MUSIC算法利用非圆信息的一种扩展,在可测向信号数、分辨力和测角精度等方面的性能均优于2q-MUSIC算法.并且,q越大,NC-2q-MUSIC算法的可测向信号数越大,分辨力越高,对模型误差也越不敏感.针对均布线阵(ULA:Uniform Linear Array)提出的NC-2q-MUSIC/ULA算法减小了计算量.仿真实验验证了NC-2q-MUSIC算法的优良性能.
基金supported by the Joint Laboratory for Ocean Observation and Detectionthe National Laboratory for Marine Science and Technology
文摘A two-dimensional direction-of-arrival(DOA) estimation method for non-uniform two-L-shaped array is presented in which the element spacing is larger than half-wavelength. To extract automatically paired low-variance cyclically ambiguous direction cosines and high-variance unambiguous direction cosines from the sub-blocks, the proposed method constructs and partitions the cross-correlation matrices. Then, the low-variance unambiguous direction cosines are obtained using the ambiguity resolved technique. Simulation results demonstrate that the proposed method has lower computation complexity and higher resolution than the existing methods especially when the elevation angles are between 70 and 90 degrees.
