Software-Defined Radio Network Positioning Technology Design. Receiver Development

Abstract

Recent trends in vehicles positioning include fusion of heterogeneous measurements from Global Navigation Satellite System (GNSS), Inertial Measurement Unit (IMU), digital maps and cellular Signals of Opportunity (SOP). The last approach, utilizing ambient Long-Term Evolution (LTE) and 5G New Radio (NR) SOPs, is relevant for localization of user equipment (UE) in dense urban GNSS-denied environment. Opportunistic localization of UE testbed, being not a cellular network subscriber, is possible with Software-Defined Radio (SDR) receiver. Current work continues research, devoted to SDR network positioning technology design, and has the purpose to develop SDR SOP receiver. Methodology employed is so called Model-Based Design (MBD) in Matlab software and hardware platform used is Universal Software Radio Peripheral (USRP). Finding of current research is experimentally validated accuracy of several meters for primary range difference measurements in developed SDR receiver for the minimum 1.4 MHz bandwidth with limitation of ideal eNB synchronization. Practical implication of contribution is readiness to perform field trials of developed SDR positioning technology for vehicles.