基于可见光和射频融合的通信定位一体化系统  

Integrated communication and positioning system enabled by fusing visible light and RF

作　　者：杨彦兵 胡超 鲁邦彦 张频频 孙奕髦 陈冠宇 YANG Yanbing;HU Chao;LU Bangyan;ZHANG Pinpin;SUN Yimao;CHEN Guanyu(College of Computer Science and Technology,Sichuan University,Chengdu 610065,China;Industrial Internet Research Institute,Sichuan University,Chengdu 610065,China;Shenzhen HCCL Co.,Ltd.,Shenzhen 518118,China)

机构地区：[1]四川大学计算机学院,四川成都610065 [2]四川大学工业互联网研究院,四川成都610065 [3]深圳华创芯光科技有限公司,广东深圳518118

出　　处：《通信学报》2023年第12期146-157,共12页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61902267,No.62272329,No.62101359)。

摘　　要：针对在可见光和射频融合网络中,传统的基于接收信号强度的用户切换方案未考虑用户切换错误率的问题,提出了基于位置的用户切换方案。具体地,设计并实现了一套基于低成本物联网芯片ESP32的可见光−射频融合的通信定位一体化系统,该系统使用可见光通信下行数据、Wi-Fi上行数据。设计了基于时−频复用的通信定位一体化框架,使用神经网络估计用户的位置,用户根据估计的位置完成切换。在通信方面,系统的吞吐量最高可达35 kbit/s;在定位方面,系统的定位精度可达2.8 cm,比传统系统的定位精度提升了33%。与基于接收信号强度的切换方案相比,所提方案的用户切换错误率降低了4%。Aiming at the problem that in the hybrid visible light and RF network,such as the traditional user switch-ing scheme leveraging received signal strength and ignoring the user switching error rate,a location-based user switching scheme was proposed.Specifically,an integrated communication and positioning system built upon low-cost IoT chip ESP32 was designed,which could fuse both visible light communication downlink and Wi-Fi up-link signals for accurate user location.A communication and positioning integration framework utilizing time-frequency multiplexing was designed,which used a neural network to estimate the user’s position,and the user completed the switching based on the estimated position.In terms of communication,the throughput of the system can reach up to 35 kbit/s.In terms of positioning,the positioning accuracy of the system can reach 2.8 cm,making a 33%improvement over traditional system.Compared with the switching scheme relying on received signal strength,user switching error rate of the proposed scheme is reduced by 4%.

关 键 词：可见光通信 融合通信系统 神经网络 通信定位一体化 用户切换 

分 类 号：TN914[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]