基于半参数估计的智能手机WiFi-RTT定位方法  

WiFi-RTT Positioning Method Based on Semi-parameter Estimation for Smartphone

作　　者：郭笑尘 李子申 汪亮 王宁波 GUO Xiao-chen;LI Zi-shen;WANG Liang;WANG Ning-bo(Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学,北京100049

出　　处：《导航定位与授时》2020年第6期60-70,共11页Navigation Positioning and Timing

基　　金：国家自然科学基金(41674043,41704038,41730109);国家重点研发计划(2017YFE0131400,2016YFB0501905);“一带一路”国际科学组织联盟资助项目(ANSO-CR-KP-2020-12);北斗重大专项应用与产业化项目(GFZX030302030201-2);中国科学院青年促进会项目。

摘　　要：近年来,以智能、智慧为特征的新经济社会形态不断涌现,依托智能手机实现低成本高精度泛在定位的需求日益迫切。总体上看,以卫星导航传感器为核心,融合异构化测距信号是实现高精度定位的主要手段。在简要分析了WiFi-RTT测距信号质量的基础上,定量分析了WiFi-RTT系统的误差特点,利用半参数方法构造了WiFi-RTT定位的观测模型和随机模型,并通过实测数据对该方法的精度和可靠性进行了验证。试验表明WiFi-RTT定位在静态和动态条件下可实现精度优于0.4m和0.6m的定位。相关研究对于推动智能手机的高精度定位应用具有重要参考价值。In recent years,with new economic and social forms characterized by intelligence,the demands for low-cost and high-precision ubiquitous location services based on smartphones are urgent.In general,with satellite navigation sensors as the core,the fusion of heterogeneous ranging signals is the main mean to achieve high-precision positioning.Based on the brief analysis of the quality of the WiFi-RTT ranging signal,this paper quantitatively analyzes the error characteristics of WiFi-RTT system,and constructs the observation model and random model of WiFi-RTT positioning by semi-parameter method,and verifies the accuracy and reliability of the method through the measured data.The test results show that the positioning accuracies of WiFi-RTT are better than 0.4m and 0.6m under static conditions and dynamic conditions respectively.The research has essential reference value for the realization of high-precision positioning based on smartphones.

关 键 词：智能手机 WiFi-RTT定位 半参数法 位置服务 

分 类 号：TN92[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]