A USRP-Based Testbed for Spectrum Sensing and Spectrum Sharing

As the development of 6G progresses, inherent contradiction between the limited nature of spectrum resources and the boundless demands becomes increasingly apparent. In response, efforts have been made to explore efficient spectrum management approaches emphasizing coexistence and sharing. In this article, an experimental testbed for spectrum sensing and spectrum sharing is implemented on USRP and LabVIEW. USRPs serve as transceivers, controlled by LabVIEW to perform spectrum sensing, opportunistic channel access and data transmission. Specifically, we specified four scenarios with two users, each owning an authorized channel, and verified the effectiveness of spectrum sharing in two paradigms of Listen-Before-Talk (LBT) model, namely Beginning-Sensing-Pattern (BSP) and End-Sensing-Pattern (ESP). Utilizing spectrum efficiency (SE) for performance evaluation, the experimental results show that LBT model has a considerable improvement compared with non-LBT scenario, and the constructed testbed is feasible to verify spectrum sharing schemes.