Sungwook Ko Hyunji Song Yulim Cho Jiwon Chung Sojeong Kim Daeun Yim Daehan Jin Anthony Smith LoRa network performance comparison between open area and tree farm based on PHY factors. 1-6 2018 SAS https://doi.org/10.1109/SAS.2018.8336763 conf/sas2/2018 db/conf/sas2/sas2018.html#KoSCCKYJS18