基于LoRa通信的无线发射台信号智能监测技术研究  

Research on wireless transmitting station signal intelligent monitoring technology based on LoRa communication

作　　者：赵志刚[1] 王磊[1] 王兰忠[1] ZHAO Zhigang;WANG Lei;WANG Lanzhong(Shandong University,Jinan 250100,China)

机构地区：[1]山东大学,山东济南250100

出　　处：《现代电子技术》2024年第15期14-18,共5页Modern Electronics Technique

基　　金：中国教育技术协会“十四五”规划重点课题:外语智慧教育环境技术支撑研究(G005)。

摘　　要：为实现大面积无线发射台信号覆盖监测,有效地抵御监测过程中多径干扰和频率选择性衰减等干扰因素的影响,研究基于LoRa通信的无线发射台信号智能监测技术。在无线发射台发出信号后,转换成数字信号进行对比,识别出有效发射台信号后,通过级联型LoRa组网方式以及LoRa通信技术,将数据发送到服务器中存储,实现无线发射台信号的传输。利用循环位移因子对基带产生的Chirp信号完成调频扩频调制,扩展信号频谱,增强信号抗干扰能力以及传输可靠性,增强信号监测的效果。实验结果表明:该方法能够在距离LoRa终端设备2.5 km处依旧接收到发射台信号,丢包率为12%,能够准确地监测到无线发射台是否存在发射信号。A wireless transmitting station signal intelligent monitoring technology based on LoRa communication is studied to achieve large-area wireless transmitting station signal coverage monitoring and effectively resist interference factors such as multipath interference and frequency selective attenuation during the process of monitoring.After the wireless transmitting station sends out signals,the signals are converted into digital ones for comparison,and effective transmitting station signals are identified.By cascaded LoRa networking and LoRa communication technology,the data is sent to the server for storage,so as to achieve the transmission of wireless transmitting station signals.The Chirp signals generated by baseband is modulated by frequency modulation and spread spectrum by cyclic shift factor(CSF),so as to expand the signal spectrum,enhance the antiinterference ability and transmission reliability of the signals and enhance the effect of signal monitoring.The experimental results show that the proposed method can be used to receive the transmitting station signals 2.5 km away from the LoRa terminal device,with a packet loss rate of 12%,and can accurately monitor whether there is transmission signals from the wireless transmitting station.

关 键 词：LoRa通信 无线信号 发射台 智能监测 调频扩频 数字信号 

分 类 号：TN972-34[电子电信—信号与信息处理]