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Title	Dcss-Lora: Pushing The Transmission Rate Limits In Lora By Enhancing The Preamble With Dual Chirp
ID_Doc	17561
Authors	Jiang J.; Wang H.; Lai G.; Chen X.; Zhang J.; Wang L.
Year	2025
Published	ACM International Conference Proceeding Series
DOI	http://dx.doi.org/10.1145/3718391.3718423
Abstract	Due to its long-range and low-power characteristics, LoRa has become a key enabler for numerous AIoT applications, ranging from smart cities to industrial automation. However, current LoRa networks face significant challenges in real-world deployments. Specifically, the slow transmission rate and low spectrum utilization stem from LoRa's limited data rate and transmission efficiency. In this paper, we propose a novel demodulation method, D-CSS, which cleverly leverages frequency differences within the LoRa preamble to modulate data, forming a Dual Chirp structure. Through practical deployment trials using USRP devices, we demonstrate that the Dual Chirp structure effectively enhances the preamble, enabling LoRa to achieve a throughput of 200 symbols/S while maintaining a SER < 5%, even under extremely low SNR conditions (< -5 dB). © 2024 Copyright held by the owner/author(s).
Author Keywords	LoRa; Low-Power Wide-Area Network; Physical Layer

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