基于非线性规划的室内TOA测距值优化方法  

Indoor TOA ranging value optimization method based on nonlinear programming

作　　者：孙健 付永领[1] 何杰[3] 谭林[2] 李胜广[2] 许文鹏[2] SUN Jian;FU Yongling;HE Jie;TAN Lin;LI Shengguang;XU Wenpeng(School of Mechanical Engineering ＆ Automation,Beijing University of Aeronautics and Astronautics,Beijing 100083,China;First Research Institute of the Ministry of Public Security of PRC,Beijing 100048,China;School of Computer and Communication Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100083 [2]公安部第一研究所,北京100048 [3]北京科技大学计算机与通信工程学院,北京100083

出　　处：《北京航空航天大学学报》2018年第8期1636-1642,共7页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金(61327807)~~

摘　　要：在室内环境中,无线信道中的非视距和多径传输等效应严重影响了到达时间(TOA)定位系统的测距值精度,从而导致较大的测量误差和定位误差。将测距值优化抽象为非线性规划问题,在实现视距/非视距(LOS/NLOS)场景识别的基础上,利用TOA测距误差模型和"目标-基站"间的几何约束为序列二阶非线性规划方法设置合理的初始值,建立了目标函数和约束条件,对定位测距值进行了有效校正。利用典型的TOA测距误差模型进行了仿真验证,利用具有TOA测距功能的无线定位节点在办公环境中进行了实测验证。结果表明,该方法优化后的测距值精度明显优于原始测距值和传统的测距值修正方法,从而验证了该方法的有效性。The ranging accuracy of time of arrival（TOA） based indoor positioning system is significantly affected by multipath and non-line-of-sight（NLOS） of wireless channel in indoor environment. And these effects result in large measurement error and positioning error. In this paper,the optimization of distance is defined as a nonlinear programming problem. Based on the detection of line of sight（LOS） and NLOS,TOA ranging error model and geometric constraints between target and base stations are used to define the initial values,objective functions and constraint conditions for sequential quadratic nonlinear programming method effectively calibrates the positioning distance value. The typical TOA range error model is used for simulation.Field validation uses wireless positioning nodes with TOA ranging functions in the office environment. The results show that the ranging accuracy of the proposed algorithm is much higher than original range value and the other traditional distance mitigation algorithms,which verifies the effectiveness of the proposed algorithm.

关 键 词：无线测距 室内定位 到达时间(TOA) 非线性规划 超宽带 

分 类 号：TN925[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]