本文提出了一种基于波束域实值处理的高阶奇异值分解(Higher-Order Singular Value Decomposition)双基地多输入多输出(Multiple-Input Multiple-Output,MIMO)雷达测角算法。该算法与传统波束域测角算法不同,通过凸优化方法对发射和接...本文提出了一种基于波束域实值处理的高阶奇异值分解(Higher-Order Singular Value Decomposition)双基地多输入多输出(Multiple-Input Multiple-Output,MIMO)雷达测角算法。该算法与传统波束域测角算法不同,通过凸优化方法对发射和接收波束域矩阵进行优化设计,可以灵活设置波束主瓣宽度并抑制副瓣电平,发射和接收波束的主副瓣比能够得到很大提高,从而达到提高回波信噪比的目的。相比于传统的矩阵信号模型,通过HOSVD获得的张量信号子空间可以得到更高的测角精度,所提算法对发射和接收波束矩阵的结构进行设计以构造实值张量信号模型。最后,通过建立映射关系的方法对插值误差进行补偿,仿真结果验证所提算法的有效性。展开更多
In this paper,a space-time adaptive processing(STAP)method is proposed for the airborne radar with the array amplitude-phase error considered,which is based on atomic norm minimization(ANM).In the conventional ANM-bas...In this paper,a space-time adaptive processing(STAP)method is proposed for the airborne radar with the array amplitude-phase error considered,which is based on atomic norm minimization(ANM).In the conventional ANM-based STAP method,the influence of the array amplitude-phase error is not considered and restrained,which inevitably causes performance deterioration.To solve this problem,the array amplitude-phase error is firstly estimated.Then,by pre-estimating the array amplitude-phase error information,a modified ANM model is built,in which the array amplitude-phase error factor is separated from the clutter response and the clutter covariance matrix(CCM)to improve the estimation accuracy of the CCM.To prove that the atomic norm theory is applicable in the presence of the array amplitude-phase error,the clutter sparsity is analyzed in this paper.Meanwhile,simulation results demonstrate that the proposed method is superior to the state-of-the-art STAP method.Moreover,the measured data is used to verify the effectiveness of the proposed method.展开更多
Research progresses on growth characteristics,application effect and optimization technology of I. aquatica floating bed were reviewed;its application problems in eutrophication water were discussed,and its applicatio...Research progresses on growth characteristics,application effect and optimization technology of I. aquatica floating bed were reviewed;its application problems in eutrophication water were discussed,and its application prospect was forecasted.展开更多
This paper takes further insight into the sparse geometry which offers a larger array aperture than uniform linear array(ULA)with the same number of physical sensors.An efficient method based on closed-form robust Chi...This paper takes further insight into the sparse geometry which offers a larger array aperture than uniform linear array(ULA)with the same number of physical sensors.An efficient method based on closed-form robust Chinese remainder theorem(CFRCRT)is presented to estimate the direction of arrival(DOA)from their wrapped phase with permissible errors.The proposed algorithm has significantly less computational complexity than the searching method while maintaining similar estimation precision.Furthermore,we combine all phase discrete Fourier transfer(APDFT)and the CFRCRT algorithm to achieve a considerably high DOA estimation precision.Both the theoretical analysis and simulation results demonstrate that the proposed algorithm has a higher estimation precision as well as lower computation complexity.展开更多
文摘本文提出了一种基于波束域实值处理的高阶奇异值分解(Higher-Order Singular Value Decomposition)双基地多输入多输出(Multiple-Input Multiple-Output,MIMO)雷达测角算法。该算法与传统波束域测角算法不同,通过凸优化方法对发射和接收波束域矩阵进行优化设计,可以灵活设置波束主瓣宽度并抑制副瓣电平,发射和接收波束的主副瓣比能够得到很大提高,从而达到提高回波信噪比的目的。相比于传统的矩阵信号模型,通过HOSVD获得的张量信号子空间可以得到更高的测角精度,所提算法对发射和接收波束矩阵的结构进行设计以构造实值张量信号模型。最后,通过建立映射关系的方法对插值误差进行补偿,仿真结果验证所提算法的有效性。
基金supported by the Fund for Foreign Scholars in University Research and Teaching Programs(the 111 Project)(B18039)。
文摘In this paper,a space-time adaptive processing(STAP)method is proposed for the airborne radar with the array amplitude-phase error considered,which is based on atomic norm minimization(ANM).In the conventional ANM-based STAP method,the influence of the array amplitude-phase error is not considered and restrained,which inevitably causes performance deterioration.To solve this problem,the array amplitude-phase error is firstly estimated.Then,by pre-estimating the array amplitude-phase error information,a modified ANM model is built,in which the array amplitude-phase error factor is separated from the clutter response and the clutter covariance matrix(CCM)to improve the estimation accuracy of the CCM.To prove that the atomic norm theory is applicable in the presence of the array amplitude-phase error,the clutter sparsity is analyzed in this paper.Meanwhile,simulation results demonstrate that the proposed method is superior to the state-of-the-art STAP method.Moreover,the measured data is used to verify the effectiveness of the proposed method.
基金Supported by the Program for Zhejiang Leading Team of S&T Innovation,China(2011R50029)Special Fund for the Construction of Modern Agricultural Industry Technology System,China(CARS-46-33)Technology Development Research Special Fund of Hangzhou Research Institute,China(20132231E04)
文摘Research progresses on growth characteristics,application effect and optimization technology of I. aquatica floating bed were reviewed;its application problems in eutrophication water were discussed,and its application prospect was forecasted.
基金supported by the Fund for Foreign Scholars in University Research and Teaching Programs(the 111 Project)(B18039)
文摘This paper takes further insight into the sparse geometry which offers a larger array aperture than uniform linear array(ULA)with the same number of physical sensors.An efficient method based on closed-form robust Chinese remainder theorem(CFRCRT)is presented to estimate the direction of arrival(DOA)from their wrapped phase with permissible errors.The proposed algorithm has significantly less computational complexity than the searching method while maintaining similar estimation precision.Furthermore,we combine all phase discrete Fourier transfer(APDFT)and the CFRCRT algorithm to achieve a considerably high DOA estimation precision.Both the theoretical analysis and simulation results demonstrate that the proposed algorithm has a higher estimation precision as well as lower computation complexity.
