Two-way Ranging Evaluation in Realistic V2V Scenarios with SDR-based Experimental Platform

In the context of joint communication and sensing (JCAS), communication systems can be used for sensing, where parameters such as time delay can be determined from channel estimation. These time delays enable applications such as ranging and localization. Various studies show that environmental conditions significantly impact sensing performance. Thus practical measurements within the actual environment are essential to overcome the limitations of simulation models. To accurately evaluate the real-world performance of sensing algorithms, a software-defined radio (SDR)-based experimental platform was developed in previous work for indoor measurements with co-located user equipments (UEs). This paper introduces extensions to the platform to enable long-range measurements. Using the enhanced platform, two-way ranging (TWR) measurements are performed in a vehicle-to-vehicle (V2V) setup to evaluate the realistic accuracy using cross-correlation (CCR)-and superresolution path delay estimation (SPDE) algorithms for ranging applications. The measurement results confirm that SPDE can improve accuracy in scenarios where the signal-to-noise ratio (SNR) and signal integrity are assured.