RIS-Aided Communications over Dirty MAC: Capacity Region and Outage Probability

Farshad Rostami Ghadi; F. Javier Lopez-Martinez

RIS-Aided Communications over Dirty MAC: Capacity Region and Outage Probability

Information Theory 2022-08-16 v1 math.IT

Authors: Farshad Rostami Ghadi , F. Javier Lopez-Martinez

Abstract

We characterize the capacity region of a two-user multiple access channel (MAC) in a reconfigurable intelligent surface (RIS)-aided communication system with side information (SI) at the transmitters. We consider two uplink communication scenarios: (i) a double dirty MAC where the interferences are known non-causally to both users; and (ii) a single dirty MAC model where only one of the users knows the interference and the other one is not aware of the interference. Considering that each of the users is assisted by a different RIS with Mi elements, we derive closed-form expressions for the capacity region and the outage probability (OP) for both system models. Results show that the use of RISs is beneficial to extend the capacity region and improve the OP in both scenarios.

Keywords

reconfigurable intelligent surface multiple access channel dirty paper coding capacity region outage probability side information

Cite

@article{arxiv.2208.07026,
  title  = {RIS-Aided Communications over Dirty MAC: Capacity Region and Outage Probability},
  author = {Farshad Rostami Ghadi and F. Javier Lopez-Martinez},
  journal= {arXiv preprint arXiv:2208.07026},
  year   = {2022}
}

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