Rhino: Bistatic Delay-Doppler Reference for Passive Radar Applications

The capability to perform joint high-resolution parameter estimation (HRPE) of delay-Doppler multipath components within the wireless propagation channel is a key requirement for technologies such as integrated sensing and communications (ICAS) and vehicle-to-everything (V2X) applications. To support the development, evaluation, and comparison of delay-Doppler HRPE algorithms, we introduce the "Rhino" dataset. This dataset provides multiple bistatic channel frequency responses aqcuired in a controlled environment in the sub-6-GHz band, comprising the reflection signatures of two rotating spheres. Moreover, the available position information of the transmitter, receiver, and both spheres renders the data metrologically assessable and enables the computation of delay-Doppler ground truth for both spheres. Consequently, the "Rhino" dataset is intended to serve as a benchmark for the objective and reproducible evaluation of delay-Doppler HRPE algorithms.