Interference Leakage Minimization in RIS-Assisted MIMO Interference Channels

Ignacio Santamaría; Mohammad Soleymani; Eduard A. Jorswieck; Jesús Gutiérrez

ICASSP 2023accepted0 citations

Interference Leakage Minimization in RIS-Assisted MIMO Interference Channels

Ignacio Santamaría, Mohammad Soleymani, Eduard A. Jorswieck, Jesús Gutiérrez

Abstract

We address the problem of interference leakage (IL) minimization in the K-user multiple-input multiple-output (MIMO) interference channel (IC) assisted by a reconfigurable intelligent surface (RIS). We describe an iterative algorithm based on block coordinate descent to minimize the IL cost function. A reformulation of the problem provides a geometric interpretation and shows interesting connections with envelope precoding and phase-only zero-forcing beamforming problems. As a result of this analysis, we derive a set of necessary (but not sufficient) conditions for a phase-optimized RIS to be able to perfectly cancel the interference on the K-user MIMO IC.

BibTeX

@inproceedings{icassp2023_interferenceleak,
  title = {Interference Leakage Minimization in RIS-Assisted MIMO Interference Channels},
  author = {Ignacio Santamaría and Mohammad Soleymani and Eduard A. Jorswieck and Jesús Gutiérrez},
  booktitle = {ICASSP 2023},
  year = {2023}
}