Impact of Spreading Factor Imperfect Orthogonality in LoRa Communications

被引：55

作者：

Croce, Daniele ^{[1
,2
]}

Gucciardo, Michele ^{[1
]}

Tinnirello, Ilenia ^{[1
]}

Garlisi, Domenico ^{[1
,2
]}

Mangione, Stefano ^{[1
]}

机构：

[1] Univ Palermo, DEIM, Viale Sci Ed 9, I-90128 Palermo, Italy

[2] CNIT Consortium, Viale GP Usberti 181-A, I-43124 Parma, Italy

来源：

DIGITAL COMMUNICATION: TOWARDS A SMART AND SECURE FUTURE INTERNET, TIWDC 2017 | 2017年 / 766卷

关键词：

D O I：

10.1007/978-3-319-67639-5_13

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

In this paper we study the impact of imperfect-orthogonality in LoRa spreading factors (SFs) in simulation and real-world experiments. First, we analyze LoRa modulation numerically and show that collisions between packets of different SFs can indeed cause packet loss if the interference power received is strong enough. Second, we validate such findings using commercial devices, confirming our numerical results. Third, we modified and extended LoRaSim, an open-source LoRa simulator, to measure the impact of inter-SF collisions and fading (which was not taken into account previously in the simulator). Our results show that non-orthogonality of the SFs can deteriorate significantly the performance especially of higher SFs (10 to 12) and that fading has virtually no impact when multiple gateways are available in space diversity.

引用

页码：165 / 179

页数：15