Backscatter Airborne radar 1 Ambient backscatter 1 Ambient backscatter communication 1 Ambients 1 Backscattering 1 Bit error rate 1 Bit-error rate 1 Channel estimation 1 Circular cylinders 1 Cryosphere 1 DDQL 1 Degrees of freedom (mechanics) 1 Dielectric materials 1 Dielectrics 1 Ellipsometry 1 Error statistics 1 Frequency estimation 1 Geological surveys 1 Ground penetrating radar systems 1 Half-cylinders 1 Intelligent reflecting surface 1 Interference cancellation 1 Internet of Things 1 Internet of Things (IoT) 1 Internet of thing 1 Internet of things 1 IoT 1 Jamming 1 LTE 1