We study a multi-user multiple-input multiple-output interference network in the presence of multiple reconfigurable intelligent surfaces (RISs). The entire system is described by using a circuit-based model for the transmitters, receivers, and RISs. This is obtained by leveraging the electromagnetic tool of mutual impedances, which accounts for the signal propagation and the mutual coupling among closely-spaced scattering elements. An iterative and provably convergent optimization algorithm that maximizes the sum-rate of RIS-assisted multi-user interference channels is introduced. Numerical results show that the sum-rate is enhanced if the mutual coupling among the RIS elements is accounted for at the optimization stage.
Abrardo, A., Dardari, D., DI Renzo, M., Qian, X. (2021). MIMO Interference Channels Assisted by Reconfigurable Intelligent Surfaces: Mutual Coupling Aware Sum-Rate Optimization Based on a Mutual Impedance Channel Model. IEEE WIRELESS COMMUNICATIONS LETTERS, 10(12), 2624-2628 [10.1109/LWC.2021.3109017].
MIMO Interference Channels Assisted by Reconfigurable Intelligent Surfaces: Mutual Coupling Aware Sum-Rate Optimization Based on a Mutual Impedance Channel Model
Abrardo A.;
2021-01-01
Abstract
We study a multi-user multiple-input multiple-output interference network in the presence of multiple reconfigurable intelligent surfaces (RISs). The entire system is described by using a circuit-based model for the transmitters, receivers, and RISs. This is obtained by leveraging the electromagnetic tool of mutual impedances, which accounts for the signal propagation and the mutual coupling among closely-spaced scattering elements. An iterative and provably convergent optimization algorithm that maximizes the sum-rate of RIS-assisted multi-user interference channels is introduced. Numerical results show that the sum-rate is enhanced if the mutual coupling among the RIS elements is accounted for at the optimization stage.File | Dimensione | Formato | |
---|---|---|---|
MIMO_Interference_Channels_Assisted_by_Reconfigurable_Intelligent_Surfaces_Mutual_Coupling_Aware_Sum-Rate_Optimization_Based_on_a_Mutual_Impedance_Channel_Model.pdf
non disponibili
Tipologia:
PDF editoriale
Licenza:
NON PUBBLICO - Accesso privato/ristretto
Dimensione
872.89 kB
Formato
Adobe PDF
|
872.89 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
2102.07155.pdf
non disponibili
Tipologia:
Pre-print
Licenza:
NON PUBBLICO - Accesso privato/ristretto
Dimensione
440.78 kB
Formato
Adobe PDF
|
440.78 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11365/1175889