Research and Experimentation of LoRa in Heavy Multipath

Research and Experimentation of
LoRa in Heavy Multipath

Recently, we came across this great paper (link, free PDF) about modeling the impact of multipath on Semtech’s LoRa modulation. Specifically, it models Rayleigh flat fading, which is observed in urban and indoor use-cases. We had just finished testing LoRaWAN vs. Haystack’s LoRa XR2 in an environment with heavy multipath interference (an airport parking garage). The results were so one-sided that we wanted to find any research that might either validate our results or, potentially, shed light on something we were doing wrong in the experiment. Fortunately, we found just the paper, and it corroborates perfectly with the experimental results we achieved.