LoRa (Long Range) is one of the most promising technologies for building the ground Internet of Things and has the advantages of low power consumption and large coverage. Based on an analysis of LoRa's performance in the field of the Internet of Things, the paper investigates LoRa's performance in the low-orbit Internet of Things satellite. First, imitate the simulation coefficients of LEO system (Iridium) to obtain the performance of LoRa under the Rician channel model with Gaussian white noise, and then analyze and compare the LoRa system under different Doppler residual frequency differences, spreading factors and transmit power Under the performance, simulation results show that LoRa modulation can meet the throughput requirements of the system. Therefore, under the simulation conditions of this paper, LoRa modulation can meet the performance requirements of low-orbit satellite Internet of Things scenarios.

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