  Long Range-Frequency Hopping Spread Spectrum (LR-FHSS) is a new physical
layer option that has been recently added to the LoRa family with the promise
of achieving much higher network capacity than the previous versions of LoRa.
In this paper, we present our evaluation of LR-FHSS based on real-world packet
traces collected with an LR-FHSS device and a receiver we designed and
implemented in software. We overcame challenges due to the lack of
documentations of LR-FHSS and our study is the first of its kind that processes
signals transmitted by an actual LR-FHSS device with practical issues such as
frequency error. Our results show that LR-FHSS meets its expectations in
communication range and network capacity. We also propose customized methods
for LR-FHSS that improve its performance significantly, allowing our receiver
to achieve higher network capacity than those reported earlier.
