摘要
为了提高LoRa技术的通信距离,提出了一种基于Turbo码和正交二分峰差(ODPD)判决法的LoRa改进方法。首先设计了一个基于Turbo码的编码方案,提高LoRa的接收灵敏度,从而提高了LoRa通信距离;然后以LoRa的频移啁啾调制(FSCM)技术为基础,提出正交二分峰差判决法,改进现有LoRa技术的解调方法,进一步提高系统接收灵敏度和通信距离。实验表明,在相同条件下与现有LoRa技术相比,该改进方法在接收灵敏度上提高了约3 dB,在自由空间下的通信距离提升了约40%。
In order to improve the communication distance of LoRa, an improved LoRa method based on Turbo code and orthogonal dichotomy peak difference decision method(ODPD) is proposed in this paper. Firstly, a Turbo coding scheme is designed to improve the reception sensitivity of LoRa and the communication distance in LoRa. Then, based on the frequency shift chirp modulation(FSCM) technique of LoRa, the orthogonal dichotomy peak difference decision method is processed to improve the demodulation method of the existing LoRa technique, and further improve the receiving sensitivity and communication distance of the system. Experiments show that under the same conditions, compared with the existing LoRa technology, the improved method improves the receiving sensitivity by about 3 dB and the communication distance in free space by about 40%.
作者
徐浪
陈小莉
田茂
谢桂辉
Xu Lang;Chen Xiaoli;Tian Mao;Xie Guihui(Electronic Information School,Wuhan University,Wuhan 430072,China;China University of Geosciences,School of Autometion,Wuhan 430074,China)
出处
《电子测量技术》
2020年第7期142-147,共6页
Electronic Measurement Technology
基金
2019年湖北省自然科学基金(2019CFB271)项目资助
