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A Communication Anti-Jamming Scheme Assisted by RIS with Angular Response

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Název: A Communication Anti-Jamming Scheme Assisted by RIS with Angular Response
Autoři: Jinpeng Wang, Wenyu Jiang, Kaizhi Huang, Xiaoli Sun
Zdroj: Entropy, Vol 25, Iss 12, p 1638 (2023)
Informace o vydavateli: MDPI AG
Rok vydání: 2023
Sbírka: Directory of Open Access Journals: DOAJ Articles
Témata: channel capacity, reconfigurable intelligent surface, anti-jamming, angular response, Science, Astrophysics, QB460-466, Physics, QC1-999
Popis: By optimizing the reconfigurable intelligent surface (RIS) reflection coefficients, the channel capacity of legitimate users can be increased, thereby enhancing the anti-jamming performance of communication systems. However, existing studies on RIS-assisted anti-jamming assume that there is no coupling between the RIS reflection coefficients and the incident angle of electromagnetic (EM) waves, which is quite unreasonable. Therefore, we consider the effect of the incident angle of EM waves on the reflection coefficients of the RIS and propose a communication anti-jamming scheme assisted by an RIS with angular response. Specifically, a problem is formulated to optimize the RIS reflection coefficients so that the legitimate signal is amplified, but the jamming signal is attenuated, thus enhancing the legitimate channel capacity. However, the coupling of the EM incident angle and the RIS reflection coefficients causes the problem to be non-convex. To tackle this problem, we equivalently transform the RIS reflection coefficients optimization problem into a quadratically constrained quadratic programming (QCQP) problem using the complex Taylor expansion and the multidimensional complex quadratic transform (MCQT) and solve it utilizing the alternating direction method of the multipliers (ADMM) algorithm. The simulation results reveal that, compared to other schemes supported by RIS without angular response, the proposed scheme is able to achieve a significant improvement in the anti-jamming performance.
Druh dokumentu: article in journal/newspaper
Jazyk: English
Relation: https://www.mdpi.com/1099-4300/25/12/1638; https://doaj.org/toc/1099-4300; https://doaj.org/article/937bab0f98b84537904a1ba55ef714ee
DOI: 10.3390/e25121638
Dostupnost: https://doi.org/10.3390/e25121638
https://doaj.org/article/937bab0f98b84537904a1ba55ef714ee
Přístupové číslo: edsbas.7EBE38F5
Databáze: BASE
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  – Url: https://doi.org/10.3390/e25121638#
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  Data: A Communication Anti-Jamming Scheme Assisted by RIS with Angular Response
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  Data: <searchLink fieldCode="AR" term="%22Jinpeng+Wang%22">Jinpeng Wang</searchLink><br /><searchLink fieldCode="AR" term="%22Wenyu+Jiang%22">Wenyu Jiang</searchLink><br /><searchLink fieldCode="AR" term="%22Kaizhi+Huang%22">Kaizhi Huang</searchLink><br /><searchLink fieldCode="AR" term="%22Xiaoli+Sun%22">Xiaoli Sun</searchLink>
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  Data: Entropy, Vol 25, Iss 12, p 1638 (2023)
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  Data: MDPI AG
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  Data: 2023
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  Data: Directory of Open Access Journals: DOAJ Articles
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  Data: <searchLink fieldCode="DE" term="%22channel+capacity%22">channel capacity</searchLink><br /><searchLink fieldCode="DE" term="%22reconfigurable+intelligent+surface%22">reconfigurable intelligent surface</searchLink><br /><searchLink fieldCode="DE" term="%22anti-jamming%22">anti-jamming</searchLink><br /><searchLink fieldCode="DE" term="%22angular+response%22">angular response</searchLink><br /><searchLink fieldCode="DE" term="%22Science%22">Science</searchLink><br /><searchLink fieldCode="DE" term="%22Astrophysics%22">Astrophysics</searchLink><br /><searchLink fieldCode="DE" term="%22QB460-466%22">QB460-466</searchLink><br /><searchLink fieldCode="DE" term="%22Physics%22">Physics</searchLink><br /><searchLink fieldCode="DE" term="%22QC1-999%22">QC1-999</searchLink>
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  Data: By optimizing the reconfigurable intelligent surface (RIS) reflection coefficients, the channel capacity of legitimate users can be increased, thereby enhancing the anti-jamming performance of communication systems. However, existing studies on RIS-assisted anti-jamming assume that there is no coupling between the RIS reflection coefficients and the incident angle of electromagnetic (EM) waves, which is quite unreasonable. Therefore, we consider the effect of the incident angle of EM waves on the reflection coefficients of the RIS and propose a communication anti-jamming scheme assisted by an RIS with angular response. Specifically, a problem is formulated to optimize the RIS reflection coefficients so that the legitimate signal is amplified, but the jamming signal is attenuated, thus enhancing the legitimate channel capacity. However, the coupling of the EM incident angle and the RIS reflection coefficients causes the problem to be non-convex. To tackle this problem, we equivalently transform the RIS reflection coefficients optimization problem into a quadratically constrained quadratic programming (QCQP) problem using the complex Taylor expansion and the multidimensional complex quadratic transform (MCQT) and solve it utilizing the alternating direction method of the multipliers (ADMM) algorithm. The simulation results reveal that, compared to other schemes supported by RIS without angular response, the proposed scheme is able to achieve a significant improvement in the anti-jamming performance.
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  Data: https://www.mdpi.com/1099-4300/25/12/1638; https://doaj.org/toc/1099-4300; https://doaj.org/article/937bab0f98b84537904a1ba55ef714ee
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  Data: 10.3390/e25121638
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      – Text: English
    Subjects:
      – SubjectFull: channel capacity
        Type: general
      – SubjectFull: reconfigurable intelligent surface
        Type: general
      – SubjectFull: anti-jamming
        Type: general
      – SubjectFull: angular response
        Type: general
      – SubjectFull: Science
        Type: general
      – SubjectFull: Astrophysics
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      – SubjectFull: QB460-466
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      – TitleFull: A Communication Anti-Jamming Scheme Assisted by RIS with Angular Response
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            – TitleFull: Entropy, Vol 25, Iss 12, p 1638 (2023
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