Cognitive radio Ambient backscatter communication 1 Ambients 1 Backscattering 1 Bayesian filtering 1 Coexistence 1 Degrees of freedom (mechanics) 1 Dynamics 1 Electromagnetic waves 1 Environmental management 1 Interference management 1 Mobile telecommunication systems 1 Radio environment 1 Radio interference 1 Reconfigurable 1 Reconfigurable intelligent surface 1 Smart radio environment 1 Spatial-spectral efficiency 1 Spectral efficiencies 1 ambient backscatter communications 1 cognitive radio 1 dynamic Bayesian network 1 interference management 1 jamming 1 reconfigurable intelligent surface 1 smart radio environment 1 spatial-spectral efficiency 1 unmanned aerial vehicles 1