5G mobile communication systems Aircraft boarding Aircraft communication Aircraft detection Beyond 5g Cabins (aircraft) Channel impulse response Connected aircraft cabin Grid mapping Impulse response K-nearest neighbor classification Mapping Motion compensation Multipath Multipath-assisted radio sensing Nearest neighbor search Occupancy detections Probabilistic grid mapping Probabilistics Radio sensing Ultra-wideband Ultra-wideband (UWB) Ultrawide band Wireless sensor network Wireless sensor networks aircraft boarding beyond 5G (B5G) channel impulse response (CIR) connected aircraft cabin k-nearest neighbor (kNN) classification