On the Robustness to Doppler Rate of the Modified LoRa using two Spreading Factors

Abstract

In [1], we proposed a modified LoRa using two spreading factors (SF’s) in order to independently set the frequency difference of adjacent LoRa symbols and the LoRa symbol period, and demonstrated that the use of two spreading factors could make it less sensitive to sampling frequency error while enabling low power transmission. In this paper, as an extension of [1], we will show that our scheme has also robustness to the Doppler rate through computer simulations.