Open AccessThe influence of LEO satellite Doppler effect on LoRa modulation and its solutio
Author(s) -
Cong Cao,
Shenghua Zhai
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1883/1/012071
Subject(s) - doppler effect , satellite , low earth orbit , modulation (music) , communications satellite , computer science , channel (broadcasting) , remote sensing , telecommunications , physics , geology , acoustics , astronomy
In order to explore the adaptability of LoRa technology in low Earth orbit satellite communications, this paper studies the influence of the Doppler effect on LoRa modulation in satellite-to-Earth radio channel, and finds that the larger the LoRa modulation spreading factor, the more vulnerable to the Doppler-Rate. The LoRa technology did not estimate and compensate the Doppler-Rate when it was designed. Therefore, this paper proposes a Doppler-Rate estimation algorithm that can better adapt the LoRa technology to low Earth orbit satellite communications.