车联网环境中基于RFID的车辆定位方法  

A Vehicle Positioning Method Based on RFID in Internet of Vehicles

作　　者：郭彬[1] 赵燕[1] 

机构地区：[1]河南交通职业技术学院,河南郑州450000

出　　处：《公路交通科技》2016年第12期140-144,158,共6页Journal of Highway and Transportation Research and Development

基　　金：河南省交通运输厅科技计划项目(2014G21)

摘　　要：为了提高车辆定位精度,提出了一种基于RFID的车辆辅助定位方法。车辆获得两个不同的位置数据:从车辆GPS接收器获得GPS坐标和通过RFID通信获得准确物理位置。通过这两个数据计算GPS误差,最后比较相邻数据来改正有误差的GPS坐标。车辆可以作为一个基站,与基站相邻的车辆可以利用基站传来的误差对车辆进行精确定位。为了减小由于信噪比变大造成的车辆位置精度下降,基于复合二次函数模型确定出加权系数,利用一种改进的加权系数方法校正了偏移误差。仿真试验结果表明:提出的基于RFID的辅助定位方法在城市道路上能获得准确的车辆位置,可以满足在车联网环境下的车辆定位精度需求。In order to improve vehicle positioning accuracy,an auxiliary vehicle positioning strategy based on RFID is proposed. Vehicles obtain 2 data from different positions： the vehicle GPS coordinates from the GPS receiver and the accurate physical location from RFID communication. Then,the GPS error can be calculated by the 2 data,and inaccurate GPS coordinates can be corrected after comparing the adjacent data. The vehicle can be served as a base station,and the adjacent vehicles can take advantage of the error from base station to calculate the precise vehicle position. In order to reduce the vehicle location precision dropping caused by signal-to-noise ratio increase,the weighted coefficient is determined based on composite quadratic function model,and the offset error is corrected by an improved weighted coefficient method. The result of simulation test shows that the accurate location of vehicles on city roads can be obtained using the proposed auxiliary positioning method based on RFID,which can meet the requirements of vehicle positioning accuracy in internet of vehicles.

关 键 词：智能交通系统 车辆定位方法 RFID 加权系数 车辆 

分 类 号：U491[交通运输工程—交通运输规划与管理]