This paper presents the first comprehensive real-world measurement campaign comparing LR-FHSS and LoRa modulations within LoRaWAN networks in urban environments. Conducted in Halifax, Canada, the campaign used a LoRaWAN platform capable of operating both modulations in the FCC-regulated US915 band. Real-world measurements are crucial for capturing the effects of urban topology and signal propagation challenges, which are difficult to fully replicate in simulations. Results show that LR-FHSS can achieve up to a 20% improvement in Packet Reception Rate (PRR) over traditional LoRa in dense urban areas. Additionally, the study investigated path loss and Received Signal Strength Indicator (RSSI), finding that LR-FHSS achieved a minimum RSSI of -138 dBm compared to LoRa's -120 dBm. The findings demonstrate that the introduction of LR-FHSS enhances communication robustness and reliability under regulatory limitations and suggest promising applications in LoRaWAN networks.

翻译：本文首次在真实城市环境中，对LoRaWAN网络中的LR-FHSS与LoRa调制进行了全面的实地测量研究。该研究在加拿大哈利法克斯进行，使用了一个能够在FCC监管的US915频段同时运行两种调制的LoRaWAN平台。真实环境测量对于捕捉城市拓扑结构和信号传播挑战的影响至关重要，这些因素在模拟中难以完全复现。结果表明，在密集城市区域，LR-FHSS相比传统LoRa可实现高达20%的数据包接收率提升。此外，研究还分析了路径损耗和接收信号强度指示，发现LR-FHSS的最低RSSI可达-138 dBm，而LoRa为-120 dBm。这些发现表明，在监管限制下引入LR-FHSS增强了通信的鲁棒性和可靠性，并预示了其在LoRaWAN网络中的广阔应用前景。