基于辅助源的同步误差下多频率融合直接定位  

Direct Position Determination based on multi-frequency fusion under synchronization errors of auxiliary sources

作　　者：刘军 张华乐 冯宝 卞宇翔 朱珂慧 李建峰[3] LIU Jun;ZHANG Huale;FENG Bao;BIAN Yuxiang;ZHU Kehui;LI Jianfeng(Information and Communication Branch,State Grid Anhui Electric Power Co.,Ltd.,Hefei Anhui 230061,China;NARI Information and Communication Technology Co.,Ltd,Nanjing Jiangsu 210003,China;College of Electric and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China)

机构地区：[1]国网安徽省电力有限公司信息通信分公司,安徽合肥230061 [2]南京南瑞信息通信科技有限公司,江苏南京210003 [3]南京航空航天大学电子信息工程学院,江苏南京210016

出　　处：《太赫兹科学与电子信息学报》2025年第3期256-263,共8页Journal of Terahertz Science and Electronic Information Technology

摘　　要：针对架设单天线的分布式定位传感器间的同步误差,提出一种基于单一辅助源的多频率融合直接定位(DPD)算法。将传感器接收到的信号进行分段,将宽带信号的频域数据转换成若干个单频信号的集合;利用传感器接收到的单辅助源信号对同步误差矩阵进行预补偿,将其代入来自目标辐射源的接收数据中,再融合多个单频信号下的子空间正交关系,结合拉格朗日乘子法构造分离未知衰减系数的最小化代价函数;最后对目标区域划分网格,通过代价函数的峰值搜索进行辐射源的估计。仿真测试结果验证了本文算法的有效性。在给定参数条件下,与另一种基于单辅助源的直接定位算法相比,本文算法计算复杂度至少降低了86.91%,在不同的信噪比(SNR)和同步误差条件下都取得了更好的定位精确度。Aiming at the synchronization errors between distributed positioning sensors equipped with single antennas,a multi-frequency fusion Direct Positioning Determination(DPD)algorithm based on a single auxiliary source is proposed.Firstly,the received signals are segmented,and the frequency-domain data of the wideband signals are converted into a set of single-frequency signals.Secondly,the synchronization error matrix is pre-compensated using the signals received from the single auxiliary source,and this matrix is then applied to the received data from the target radiation source.Next,the subspace orthogonality relationships under multiple single-frequency signals are fused,and a minimized cost function that separates the unknown attenuation coefficients is constructed using the Lagrange multiplier method.Finally,the target area is divided into a grid,and the radiation source is estimated through peak searching of the cost function.Simulation results validate the effectiveness of the proposed algorithm.Under given parameter conditions,compared with another single-auxiliary-source-based direct positioning algorithm,the computational complexity of this algorithm is reduced by at least 86.91%,achieving better positioning accuracy under different Signal-to-Noise Ratio(SNR)and synchronization error conditions.

关 键 词：分布式传感器 同步误差 单一辅助源 直接定位 多频率融合 子空间正交 

分 类 号：TN911.7[电子电信—通信与信息系统]