基于LoRa的地下停车场车辆定位系统设计  

Design of LoRa-based Vehicle Positioning System Applied to Underground Parking Lots

作　　者：庄凯凯 何安平[2] 袁磊[2] 冯志华 吴尽昭[1] ZhuangKaikai;He Anping;Yuan Lei;Feng Zhihua;Wu Jinzhao(Guangxi Key Laboratory of Hybrid Computation and IC Design Analysis,Guangxi University for Nationalities, Nanning 530000,China;School of Information Science and Engineering,Lanzhou University,Lanzhou 730000, China;Beijing Institute of Computer Technology and Application,Beijing 100000,China)

机构地区：[1]广西民族大学广西混杂计算与集成电路设计分析重点实验室,南宁530000 [2]兰州大学信息科学与工程学院,兰州730000 [3]北京计算机技术及应用研究所,北京100000

出　　处：《计算机测量与控制》2019年第2期180-185,共6页Computer Measurement &Control

基　　金：国家自然科学基金项目(11461006;61772006);广西科技计划项目(AB17129012;AA17204096);广西科技基地和人才专项项目(2016AD05050);广西"八桂学者"专项资助;广西民族大学研究生教育创新计划项目(gxun-chxps201768;gxun-chxzs2017115)

摘　　要：利用LoRa在抗干扰、低功耗、低成本方面的优势,设计了一种基于LoRa的地下停车场车辆定位系统;针对地下停车场特殊通信环境,对非视距(Not Line of Sight,NLOS)时延模型进行分析;将排序算法与典型均值滤波算法相结合,改善典型均值滤波算法只能将脉冲噪声在滤波窗口内均摊而不能彻底消除的固有缺陷;通过参数拟合的方法,对地下停车场环境下规律性的NLOS时延和节点模块处理误差进行抑制;对三边定位算法进行优化,提高定位精度,避免无解情况的发生;在实际环境中进行测试,验证了系统的可行性。With the advantages of LoRa in anti-interference,low power consumption and low cost,a vehicle positioning system based on LoRa for underground parking lots is designed.The NLOS delay model is analyzed in the special communication environment of underground parking lots.In this paper we combine the sorting algorithm with the typical mean filtering algorithm to overcome the downside of the typical mean filtering algorithm that the impulse noise can only be shared equally in the filter window and cannot be completely eliminated.Besides,we use the method of parameter fitting to suppress the regular NLOS delay in underground parking environment and processing the error of the label node module.We also optimize the Trilateration Method to improve the accuracy of positioning and avoid the situation of the occurrence of no solution.The system is applied in actual environment and the feasibility of the system is verified.

关 键 词：LoRa NLOS 均值滤波 参数拟合 三边定位算法 

分 类 号：TN929.5[电子电信—通信与信息系统]