Interference leakage minimization in RIS-assisted MIMO interference channels

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URI: https://hdl.handle.net/10902/31751
ISBN: 978-1-7281-6327-7
ISBN: 978-1-7281-6328-4
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Autoría
Santamaría Caballero, Luis IgnacioAutoridad Unican; Soleymani, Mohammad; Jorswieck, Eduard; Gutiérrez Terán, Jesús
Fecha
2023
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© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publicado en
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Rhodes Island, Greece, 2023, 796-800
Editorial
Institute of Electrical and Electronics Engineers, Inc.
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Palabras clave
Reconfigurable intelligent surface (RIS)
Interference channel
Multiple-input multiple-output
Interference leakage minimization
Resumen/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.
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