| 摘要: |
| LoRa是目前工业界大力推广的一种低功耗广域网技术（LPWAN）技术，但其中的核心调制技术专利由美国Semtech公司拥有，其技术细节没有被公开。基于此，针对LoRa的调制解调技术原理进行详细的数学描述，并给出了具体的调制解调算法。同时，对LoRa调制的性能进行了高斯白噪声信道及多径衰落信道下的仿真比较，仿真结果验证了LoRa调制技术在低速远距离通信场景中的优越性。 |
| 关键词: 低功耗广域网 物联网 LoRa 线性调频 匹配滤波 |
| DOI： |
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| 基金项目:北京市自然科学基金资助项目（1183126）；河南省教改重点项目（［2015］061号） |
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| LoRa modulation and demodulation algorithm |
| LIU Shudan,SUN Jixuan |
| (1.Xuchang Gengxin Information Science Research Institute,Xuchang 461000,China;2.Aviation Engineering Institute，Xuchang Vocational Technical College,Xuchang 461000,China;School of Automation,Beijing Institute of Technology,Beijing 100081,China) |
| Abstract: |
| LoRa is a Low Power Wide Area Network(LPWAN) technology popularized by the industries at present.However,the core modulation technology of LoRa is patented by Semtech Company,and its technical details has never been disclosed.This paper aims to describe the mathematical principle of LoRa modulation in detail,and gives a special modulation and demodulation algorithm.Meanwhile,the performance of LoRa modulation technology is investigated under the additive white Gaussian noise channel and fading channel condition.The simulation results verify the superiority of LoRa modulation technology in low data rate and long range communication scene. |
| Key words: low power wide area network(LPWAN) Internet of Things(IoT) LoRa chirp modulation matched filtering |
