TY - GEN
T1 - Don't miss weak packets
T2 - 41st IEEE Conference on Computer Communications, INFOCOM 2022
AU - Hou, Ningning
AU - Xia, Xianjin
AU - Zheng, Yuanqing
PY - 2022
Y1 - 2022
N2 - LoRa technology promises to connect billions of battery-powered devices over a long range for years. However, recent studies and industrial deployment find that LoRa suffers severe signal attenuation because of signal blockage in smart cities and long communication ranges in smart agriculture applications. As a result, weak LoRa packets cannot be correctly demodulated or even be detected in practice. To address this problem, this paper presents the design and implementation of MALoRa: a new LoRa reception scheme which aims to improve LoRa reception performance with antenna diversities. At a high level, MALoRa improves signal strength by reliably detecting and coherently combining weak signals received by multiple antennas of a gateway. MALoRa addresses a series of practical challenges, including reliable packet detection, symbol edge extraction, and phase-aligned constructive combining of weak signals. Experiment results show that MALoRa can effectively expand communication range, increase battery life of LoRa devices, and improve packet detection and demodulation performance especially in ultra-low SNR scenarios.
AB - LoRa technology promises to connect billions of battery-powered devices over a long range for years. However, recent studies and industrial deployment find that LoRa suffers severe signal attenuation because of signal blockage in smart cities and long communication ranges in smart agriculture applications. As a result, weak LoRa packets cannot be correctly demodulated or even be detected in practice. To address this problem, this paper presents the design and implementation of MALoRa: a new LoRa reception scheme which aims to improve LoRa reception performance with antenna diversities. At a high level, MALoRa improves signal strength by reliably detecting and coherently combining weak signals received by multiple antennas of a gateway. MALoRa addresses a series of practical challenges, including reliable packet detection, symbol edge extraction, and phase-aligned constructive combining of weak signals. Experiment results show that MALoRa can effectively expand communication range, increase battery life of LoRa devices, and improve packet detection and demodulation performance especially in ultra-low SNR scenarios.
UR - http://www.scopus.com/inward/record.url?scp=85133258498&partnerID=8YFLogxK
U2 - 10.1109/INFOCOM48880.2022.9796699
DO - 10.1109/INFOCOM48880.2022.9796699
M3 - Conference proceeding contribution
AN - SCOPUS:85133258498
SN - 9781665458238
SP - 530
EP - 539
BT - IEEE INFOCOM 2022 - IEEE Conference on Computer Communications
PB - Institute of Electrical and Electronics Engineers (IEEE)
CY - Piscataway, NJ
Y2 - 2 May 2022 through 5 May 2022
ER -