NLOS环境下基于散射体信息的TDOA定位算法  

TDOA Positioning Algorithm Based on Scatterer Information in NLOS Environment

作　　者：孟天次 张贞凯[1] MENG Tianci;ZHANG Zhenkai(Ocean College,Jiangsu University of Science and Technology,Zhenjiang 212028,China)

机构地区：[1]江苏科技大学海洋学院,江苏镇江212028

出　　处：《火力与指挥控制》2022年第12期48-52,58,共6页Fire Control & Command Control

基　　金：国家自然科学基金(61871203);江苏省研究生实践创新计划基金资助项目(SJCX22_1886)。

摘　　要：单次反射圆模型能够有效解决非视距环境对定位精度带来的不利影响,其主要依靠于散射体信息对目标进行定位,通常使用圆拟合算法估计散射体的位置和散射距离。提出加权最小二乘-圆拟合(WLS-CF)算法。首先对测量噪声进行加权处理,然后对散射体信息进行估计,有效抑制了圆拟合法将测量噪声乘性放大,提高了散射体信息估计精度的同时,进一步提高了对目标的定位结果。仿真实验表明,所提算法相比于现有的算法有着更好的定位性能。The single reflection circle model can effectively solve the adverse effects of non-lineof-sight environment on the positioning accuracy,and it mainly relies on the scatterer information to locate the target.The circle fitting algorithm is usually used to estimate the position of the scatterer and the scattering distance.The weighted least squares-circle fitting(WLS-CF)algorithm is proposed.The measurement noise is first weighted,and then the scatterer information is estimated,the multiplicative amplification of the measurement noise is effectively suppressed by the circle fitting method.While the accuracy of scatterer information estimation is improved,the positioning result of the target is further improved.The simulation experiments show that the proposed algorithm has better positioning performance than existing algorithms.

关 键 词：非视距 单次反射圆 散射体信息 圆拟合 加权最小二乘 

分 类 号：TN92[电子电信—通信与信息系统]