This paper presents a novel testbed designed for 5th-Generation (5G) positioning using Universal Software Radio Peripherals (USRPs). The testbed integrates multiple units: an Operation Unit for test management, a User Unit equipped with an Ettus E312 USRP, and a Station Unit featuring an Ettus N310 USRP equipped with a three-element Uniform Linear Array for Angle of Arrival estimation. Alongside ultra wideband ranging, the testbed estimates the user's position relative to the base station. Signal processing algorithms are executed in a dedicated processing unit. Key challenges addressed include phase misalignment between RX channel pairs due to different Local Oscillators in the Ettus N310, necessitating real-time calibration for precise signal alignment. High sampling rates (up to 61.44 MSps) result in large IQ sample files, managed efficiently using a snapshot technique to optimize storage without compromising testbed positioning capabilities. The testbed synchronizes angular measurements with ranging estimates allowing consistent performance evaluation for real-life cases of dynamic users (e.g. pedestrian). Experimental results demonstrate the testbed's effectiveness in achieving accurate pedestrian user localization.
@article{arxiv.2411.16496,
title = {USRP-Based Single Anchor Positioning: AoA with 5G Uplink Signals, and UWB Ranging},
author = {Thodoris Spanos and Fran Fabra and José A. López-Salcedo and Gonzalo Seco-Granados and Nikos Kanistras and Ivan Lapin and Vassilis Paliouras},
journal= {arXiv preprint arXiv:2411.16496},
year = {2025}
}
Comments
5 pages, 6 figures, to be presented in an ESA workshop