Characterization of Indoor Environment in the 60 GHz band

Joint RIS-Assisted Localization and Communication: A Trade-off Among Accuracy, Spectrum Efficiency, and Time Resource

“…The RIS-UE propagation channel follows the model in (15). Moreover, S = 3 isotropic scatterers [23] are randomly positioned in L. They are characterized by a reflection coefficient whose square magnitude is -20 dB. All the links also experience shadowing effects that we assume to be log-normally distributed with variance σ sh = 2 dB.…”

User location uncertainty in RIS-aided channel optimization

“…The BS-RIS and RIS-UE links are assumed to be LoS. The RIS-UE propagation channel follows the model in (7) with S = 3 reflectors [12] randomly positioned in the area L and characterized by a reflection coefficient whose square magnitude is ρ 2 k,n,s = −20 dB for s = 1, 2, 3 and for every UE k and RIS n. All the links also experience shadowing effects, i.e., the r.v. a k,n,s in (7) are lognormally distributed with variance σ sh = 2 dB.…”