On the Rate and Energy Efficiency Comparison of Reconfigurable Intelligent Surfaces with Relays

Konstantinos Ntontin (1) , Marco Di Renzo (2, 3, 4) , Fotis Lazarakis (1)

1 NCSR - National Center for Scientific Research "Demokritos"
2 CNRS - Centre National de la Recherche Scientifique
3 Université Paris-Saclay
4 L2S - Laboratoire des signaux et systèmes

In this paper, we perform a performance comparison, in terms of achievable rate and energy efficiency, of a reconfigurable intelligent surface (RIS)-aided nextgeneration fronthaul network operating in the D band with its relay-aided counterpart. For their energy efficiency comparison, the insertion losses and power consumption of the electronic components related with the deployed nodes is taken into account. Numerical results show that the RIS-aided network outperforms the relay-aided one, both in terms of rate and energy efficiency, only for adequately large RISs.

Mots clés: D band; reconfigurable intelligent surfaces; relays; rate; energy efficiency

Domaines: Traitement du signal et de l'image [eess.SP]

Konstantinos Ntontin, Marco Di Renzo, Fotis Lazarakis. On the Rate and Energy Efficiency Comparison of Reconfigurable Intelligent Surfaces with Relays. 21st IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC 2020), May 2020, Atlanta (virtual ), United States. ⟨10.1109/SPAWC48557.2020.9154308⟩. ⟨hal-03022567⟩