RIS-Enhanced Spectrum Sensing: How Many Reflecting Elements are Required to Achieve a Detection Probability Close to 1?

Ge, Jungang; Liang, Ying-Chang

doi:10.1109/twc.2022.3167474

Cited by 27 publications

(4 citation statements)

References 43 publications

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“…They show that more than 50% increase of beamforming gain can be achieved with a reduced cost when comparing to the same size MIMO array. Exploring the benefit of passive HMIMOS in spectrum sensing, the authors of [272] evaluate the detection probability in an asymptotic fashion with the statistically configured passive HMIMOS. Under this setting, equivalent channel gains are provided and an insight on the required number of reflecting elements of HMIMOS for achieving a near 100% detection probability is theoretically analyzed.…”

Section: B Various Extensionsmentioning

confidence: 99%

Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions

Gong¹,

Vinieratou²,

Ji³

et al. 2023

Preprint

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<p>Future wireless systems are envisioned to create an endogenously holography-capable, intelligent, and programmable radio propagation environment, that will offer unprecedented capabilities for high spectral and energy efficiency, low latency, and massive connectivity. A potential and promising technology for supporting the expected extreme requirements of the sixth-generation (6G) communication systems is the concept of the holographic multiple-input multiple-output (MIMO) surface (HMIMOS), which will actualize holographic radios with reasonable power consumption and fabrication cost. An HMIMOS is an ultra-thin and nearly continuous aperture that incorporates reconfigurable and sub-wavelength-spaced antennas and/or metamaterials. Such surfaces comprising dense electromagnetic (EM) excited elements are capable of recording and manipulating impinging fields with utmost flexibility and precision, as well as with reduced cost and power consumption, thereby shaping arbitrary-intended EM waves with high energy efficiency. The powerful EM processing capability of HMIMOS opens up the possibility of wireless communications of holographic imaging level, paving the way for signal processing techniques realized in the EM domain, possibly in conjunction with their digital-domain counterparts. However, in spite of the significant potential, the studies on HMIMOS-based wireless systems are still at an initial stage, its fundamental limits remain to be unveiled, and critical technical challenges with holographic MIMO communications need to be addressed. In this survey, we present a comprehensive overview of the latest advances in the holographic MIMO communications paradigm, with a special focus on their physical aspects, their theoretical foundations, as well as the enabling technologies for HMIMOS systems. We also compare HMIMOS systems with conventional multi-antenna technologies, especially massive MIMO systems, present various promising synergies of HMIMOS with current and future candidate technologies, and provide an extensive list of research challenges and open directions for future HMIMOS-empowered wireless applications.</p>

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Section: B Various Extensionsmentioning

confidence: 99%

Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions

Gong¹,

Vinieratou²,

Ji³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…They showed that more than 50% increase of beamforming gain can be achieved with a reduced cost when comparing to the same size MIMO arrays. Exploring the benefit of passive HMIMO surfaces in spectrum sensing, the authors of [309] evaluated the detection probability in an asymptotic fashion. Under this setting, equivalent channel gains were provided and an insight on the required number of reflecting elements for achieving a near 100% detection probability was theoretically analyzed.…”

Section: B Various Extensionsmentioning

confidence: 99%

Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions

Gong¹,

Gavriilidis²,

Ji³

et al. 2023

Preprint

View full text Add to dashboard Cite

<p>Future wireless systems are envisioned to create an endogenously holography-capable, intelligent, and programmable radio propagation environment, that will offer unprecedented capabilities for high spectral and energy efficiency, low latency, and massive connectivity. A potential and promising technology for supporting the expected extreme requirements of the sixth-generation (6G) communication systems is the concept of the holographic multiple-input multiple-output (HMIMO), which will actualize holographic radios with reasonable power consumption and fabrication cost. The HMIMO is facilitated by ultra-thin, extremely large, and nearly continuous surfaces that incorporate reconfigurable and sub-wavelength-spaced antennas and/or metamaterials. Such surfaces comprising dense electromagnetic (EM) excited elements are capable of recording and manipulating impinging fields with utmost flexibility and precision, as well as with reduced cost and power consumption, thereby shaping arbitrary-intended EM waves with high energy efficiency. The powerful EM processing capability of HMIMO opens up the possibility of wireless communications of holographic imaging level, paving the way for signal processing techniques realized in the EM-domain, possibly in conjunction with their digital-domain counterparts. However, in spite of the significant potential, the studies on HMIMO communications are still at an initial stage, its fundamental limits remain to be unveiled, and a certain number of critical technical challenges need to be addressed. In this survey, we present a comprehensive overview of the latest advances in the HMIMO communications paradigm, with a special focus on their physical aspects, their theoretical foundations, as well as the enabling technologies for HMIMO systems. We also compare the HMIMO with existing multi-antenna technologies, especially the massive MIMO, present various promising synergies of HMIMO with current and future candidate technologies, and provide an extensive list of research challenges and open directions for future HMIMO-empowered wireless applications.</p>

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“…Research on RISassisted mobile communication has also been greatly developed. The channel modeling and channel estimation problem assisted by RIS in [1] and [2], the information and energy synchronous transmission combined with RIS in [3] and [4], the physical layer security transmission assisted by RIS in [5], the multi-antenna beamforming in [6], and the assisted cognitive radio communication in [7] have been more and more widely and deeply studied.…”

Section: Introductionmentioning

confidence: 99%

Physical Layer Secure Transmission in the Coexistence of V2I and V2V with RIS Assistance

Tang,

Song,

2024

Preprint

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The security of vehicle communication becomes increasingly important due to the transmission requirement of large-scale security and privacy data in the Internet of Vehicles (IoV). This paper investigates the physical layer secure transmission with reconfigurable intelligent surface (RIS) assistance in the coexistence of vehicle-to-infrastructure (V2I) and vehicle-to-vehicle (V2V). It establishes a communication model for physical layer secure transmission where the eavesdropping user exists. Based on this model, we propose a V2I physical layer secure transmission rate (PLSTR) maximization problem and solve it by employing an alternating optimization algorithm based on generalized Rayleigh entropy and semi-definite relaxation programming so as to obtain optimal V2I base station precoding and RIS reflection coefficient matrix. Simulation results further validate the superiority of the proposed algorithm and analyze the impact of relevant parameters on system performance.

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RIS-Enhanced Spectrum Sensing: How Many Reflecting Elements are Required to Achieve a Detection Probability Close to 1?

Cited by 27 publications

References 43 publications

Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions

Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions

Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions

Physical Layer Secure Transmission in the Coexistence of V2I and V2V with RIS Assistance

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