Room Reconstruction Based on Bi-Static mmWave RADAR Using the Antenna Pattern Information

Joint communication and sensing (JCAS) is one of the key topics of the upcoming 6G mobile communication standard. We propose a novel three-step method to extract the position of reflectors from channel impulse responses (CIRs) obtained by multiple bi-static RADAR measurements. The method consists of the extraction of angle-of-departure (AoD) and angle-of-arrival (AoA), the computation of potential reflecting points and the classification of the propagation paths. For the extraction of AoD and AoA, we propose a novel algorithm with low computational effort. It has a better resolution than the step size of the underlying beam search process by utilizing the antenna beam pattern together with the evaluation of the CIR. The algorithm is compared to a straightforward approach in a raytracing simulation. The evaluation shows that the proposed novel algorithm outperforms the state-of-the-art approach. Furthermore, we discuss the limitations of the proposed room reconstruction method and the potential impacts of physical effects not covered in the simulation.