INTERFERENCE ANALYSIS IN RECONFIGURABLE INTELLIGENT SURFACE-ASSISTED MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEMS

Jiang Liu (1, 2) , Xuewen Qian (1, 2) , Marco Di Renzo (1, 3, 2)

1 L2S - Laboratoire des signaux et systèmes
2 Université Paris-Saclay
3 CNRS - Centre National de la Recherche Scientifique

Reconfigurable intelligent surfaces (RISs) are regarded as an emerging technology for the next generation of wireless communications. In this paper, we consider a multiple-input multiple-output network where each base station serves a user equipment with the aid of an RIS equipped with N reconfigurable elements. We characterize the interference at one user equipment that is caused by the signal emitted by its non-serving (interfering) RIS. By assuming Rayleigh fading channels, we study the corresponding interference-to-noiseratio (INR) under the assumption of large values of N , and we prove that the INR is the product of a Chi-Square random variable (RV) and an RV that is approximated with a Gamma distribution. In addition, we prove that the amount of fading of the INR is equal to one in the large N regime.

Mots clés: Reconfigurable intelligent surfaces; multiantenna transmission; performance analysis

Domaines: Electronique

Jiang Liu, Xuewen Qian, Marco Di Renzo. INTERFERENCE ANALYSIS IN RECONFIGURABLE INTELLIGENT SURFACE-ASSISTED MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEMS. IEEE International Conference on Communications, Jun 2021, Toronto, Canada. ⟨10.1109/ICASSP39728.2021.9414684⟩. ⟨hal-03373532⟩