一种新的近场源距离及到达角联合估计算法  

A new Method for Range and DOA Estimation of Near-Field Sources

作　　者：黄家才[1] 石要武[1] 陶建武[2] 

机构地区：[1]吉林大学通信工程学院,长春130022 [2]空军航空大学,长春130022

出　　处：《电子与信息学报》2007年第11期2738-2742,共5页Journal of Electronics & Information Technology

基　　金：吉林大学研究生创新基金(502039);国家自然科学基金(69872012);吉林省基础研究计划基金(20030519)资助课题

摘　　要：该文提出一种基于三阶循环矩的近场源距离以及到达角联合估计算法。该算法充分利用了信号的循环平稳特性以及其空、时域信息,通过构造时空矩阵并进行特征分解获得二维参数的闭式估计。该方法计算简单,无需谱峰搜索,而且二维参数自动配对。与现有的方法相比,该文算法并不要求阵列具有中心对称结构,因此避免了阵列孔径的损失;此外该算法对任意分布的加性平稳噪声以及具有不同循环频率的干扰信号有较好的抑制能力。计算机仿真实验验证了该方法的有效性。A new method based on third-order cyclic moment is presented for joint estimation of Directions-Of-Arrival （DOA＇s） and range of near-field sources. By exploiting the cyclostationarity and space-time information of the signals, the parameters are directly given by the eigendecomposition of certain constructed DOA-matrix. Compared with several existing approaches, the loss of array aperture is voided since the proposed method doesn＇t need a symmetrical array. Moreover, the proposed method can effectively suppress the additive stationary noises with any distribution and interfering signals with different cyclic frequency, and the parameters match automatically in the process. Some numerical simulations illustrate the effectiveness of the proposed algorithm.

关 键 词：DOA估计 近场源 距离估计 循环平稳 

分 类 号：TN911.23[电子电信—通信与信息系统]