Method and device for decoding conflicting uplink signals of lora data packets

Abstract

Embodiments of the present invention provide a method and device for decoding conflicting uplink signals of LoRa data packets. The method includes: obtaining signals of a plurality of LoRa data packets received by the current receiving window of the gateway, and combining the starting point of the current receiving window with any LoRa data packet The starting point of the packet is aligned; the signal is divided into multiple sub-receiving windows of the current receiving window after alignment; after the signal in any sub-receiving window is despread, then Fourier transform is performed to obtain the sub-receiving window The height of each peak of the signal; according to the height of each peak of the signal in the sub-receiving window, determine whether the modulation symbol to which each peak belongs is aligned with the sub-receiving window, and extract from the signal of the sub-receiving window to align with the sub-receiving window The peaks of the modulation symbols of , and decode the peaks. The embodiment of the present invention realizes accurate decoding of conflicting uplink signals of LoRa data packets without consuming additional terminal node energy.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for decoding conflicting uplink signals of LoRa data packets. Background technique [0002] LoRa (Long Range Radio) technology is a low-power wide-area network technology with long-distance transmission and low power consumption, and is widely used in IoT systems. Deployed end nodes can continue to operate for many years when powered by batteries. In addition, the signal can be transmitted to the LoRa gateway dozens of kilometers away in an unobstructed environment. When networking, the LoRa gateway adopts a star network topology, that is, a single LoRa gateway can simultaneously connect thousands of terminal nodes within the communication range. When multiple terminal nodes send uplink signals of LoRa data packets to the LoRa gateway at the same time, these signals will conflict at the LoRa gateway, causing data damage or even packet ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for decoding conflicting uplink signals of LoRa data packets, which is used to solve the conflicting uplink signal decoding method of LoRa data packets in the prior art, which needs to consume a large amount of additional terminal node energy and has great limitations. And the defect that the decoding result is inaccurate, realizes accurate decoding of the conflicting uplink signal of the LoRa data packet without consuming additional energy of the terminal node

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