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    On the Capacity of Reconfigurable Intelligent Surface Assisted MIMO Symbiotic Communications

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    Type
    Article
    Authors
    Ye, Jia cc
    Guo, Shuaishuai
    Dang, Shuping
    Shihada, Basem cc
    Alouini, Mohamed-Slim cc
    KAUST Department
    Communication Theory Lab
    Computer Science Program
    Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division
    Electrical and Computer Engineering
    Electrical and Computer Engineering Program
    Networks Laboratory (NetLab)
    Date
    2021-09-06
    Online Publication Date
    2021
    Print Publication Date
    2022-03
    Submitted Date
    2020-11-30
    Permanent link to this record
    http://hdl.handle.net/10754/670970
    
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    Abstract
    Reconfigurable intelligent surfaces (RISs) appear as one of the most promising paradigms for future wireless communications, because of their high adjustability for diverse communication demands and the additional information-carrying capability by reflecting patterns. This paper investigates the capacity of RIS-assisted multiple-input multiple-output (MIMO) symbiotic communications utilizing multiple reflecting patterns, where each reflecting pattern is non-uniformly activated to carry additional information. To enhance transmission performance, the reflecting patterns, reflecting activation probability, and the transmit covariance matrix are jointly designed. Since the exact expression of the system capacity is intractable, the lower and upper bounds on the capacity are derived and used for optimization in this paper. Based on the lower bound on the capacity, a gradient ascent algorithm is developed to find the optimal reflecting patterns, reflecting activation probability, and the transmit covariance matrix. By taking advantage of the concise-form upper bound on the capacity, closed-form solutions of the reflecting activation probability and transmit covariance matrix can be derived after optimizing the reflecting patterns. The superiority of the proposed design is investigated and verified by computer simulations. Some selected numerical results demonstrate that the proposed design can achieve a higher capacity than the benchmark adopting only one reflecting pattern.
    Citation
    Ye, J., Guo, S., Dang, S., Shihada, B., & Alouini, M.-S. (2021). On the Capacity of Reconfigurable Intelligent Surface Assisted MIMO Symbiotic Communications. IEEE Transactions on Wireless Communications, 1–1. doi:10.1109/twc.2021.3108458
    Sponsors
    This work of J. Ye, B. Shihada, and M.-S. Alouini was funded by the KAUST Office of Sponsored Research. The work of S. Guo is supported by in part by the National Natural Science Foundation of China under Grant 62171262 and 61801266, and in part by Major Scientific and Technological Innovation Project of Shandong Province under Grant 2020CXGC010109. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Sofie Pollin.
    Publisher
    IEEE
    Journal
    IEEE Transactions on Wireless Communications
    DOI
    10.1109/TWC.2021.3108458
    Additional Links
    https://ieeexplore.ieee.org/document/9530367/
    https://ieeexplore.ieee.org/document/9530367/
    https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9530367
    ae974a485f413a2113503eed53cd6c53
    10.1109/TWC.2021.3108458
    Scopus Count
    Collections
    Articles; Computer Science Program; Electrical and Computer Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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