5G NR Signal Detection Using SDR

Abstract—The increasing demand for high-speed and reliable 5G networks necessitates efficient spectrum utilization and pre- cise user positioning. This paper integrates high-precision 5G- NR downlink signal detection, software-defined radio (SDR)- based positioning, and transmitter development to enhance 5G spectrum sharing and localization accuracy. A novel SDR- based detection system is proposed, leveraging dynamic spectrum sharing (DSS) and advanced synchronization techniques to im- prove interference-free spectrum access. Additionally, a network positioning framework using positioning reference signals (PRS) and observed time difference of arrival (OTDOA) is developed, achieving sub-meter accuracy. Experimental evaluations validate the system’s efficiency, demonstrating 99% detection accuracy in controlled environments and robust positioning capabilities. The results highlight the potential of SDR for flexible and cost-effective 5G network optimization, paving the way for future enhancements in spectrum management and location- based services.