Development of Channel Sounder using GNU Radio/USRP: Timing Synchronization and Phase Alignment

摘要

This paper presents a low-cost flexible channel sounder with the maximum bandwidth of 12.5MHz operating at various frequency bands within 400 - 4400 MHz developed by using GNU radio/USRP. This paper describes an improved work based on its previous channel sounding system and especially focuses on the techniques of timing synchronization and phase alignment which were hard to achieve in its previous work. Finally, The effect of improvement of previous work was demonstrated and validated by a DUT test.