Investigating the Performance of LoRa Communication for Nominal LoRa and Interleaved Chirp Spreading LoRa

Abstract

The latest communication technology in Low Power Wide Area Networks (LPWAN) is LoRa. It prioritizes long-range transmission with a high detecting sensitivity and can operate efficiently below noise interference or noise floor. LoRa employs chirp spread spectrum modulation with six spreading factors; the rate of these chirps varies based on the value of the spreading factors. Increasing the spreading factor extends the range of LoRa communications at the cost of a decrease in the data transmission rate. Interleaved chirp spreading LoRa (ICS-LoRa) is a novel multi-dimensional space that attempts to improve the LoRa network”s transmission rate. In this paper, we propose a system with two transmitters and receivers, one for Nominal LoRa and one for ICS-LoRa, that may encode the same symbols through Nominal LoRa and ICS-LoRa and utilize this system to investigate and demonstrate that ICS-LoRa receives the same symbols as Nominal LoRa. In our simulation, we employ three distinct sets of symbols with various spreading factors. At the receiver side, Our symbols detect well for both Nominal LoRa and ICS-LoRa, and we observe that the FFT amplitude decreases by about 50% when ICS-LoRa modulation is used.