Movable-Element Simultaneously Transmitting And Reflecting Reconfigurable Intelligent Surface-Assisted Integrated Sensing And Covert Communication System: Joint Active and Flexible Passive Beamforming Design

ZHOU Tao; XU Kui; XIA Xiaochen; HU Guojie; LI Chunguo; XIE Wei

doi:10.11999/JEIT240601

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ZHOU Tao, XU Kui, XIA Xiaochen, HU Guojie, LI Chunguo, XIE Wei. Movable-Element Simultaneously Transmitting And Reflecting Reconfigurable Intelligent Surface-Assisted Integrated Sensing And Covert Communication System: Joint Active and Flexible Passive Beamforming Design[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240601

Citation:

ZHOU Tao, XU Kui, XIA Xiaochen, HU Guojie, LI Chunguo, XIE Wei. Movable-Element Simultaneously Transmitting And Reflecting Reconfigurable Intelligent Surface-Assisted Integrated Sensing And Covert Communication System: Joint Active and Flexible Passive Beamforming Design[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240601

Citation:

ZHOU Tao, XU Kui, XIA Xiaochen, HU Guojie, LI Chunguo, XIE Wei. Movable-Element Simultaneously Transmitting And Reflecting Reconfigurable Intelligent Surface-Assisted Integrated Sensing And Covert Communication System: Joint Active and Flexible Passive Beamforming Design[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240601

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Movable-Element Simultaneously Transmitting And Reflecting Reconfigurable Intelligent Surface-Assisted Integrated Sensing And Covert Communication System: Joint Active and Flexible Passive Beamforming Design

doi: 10.11999/JEIT240601

1.
College of Communication Engineering, Army Engineering University of PLA, Nanjing, 210007, China
2.
College of Communication Engineering, Rocket Force University of Engineering, Xi’an, 710025, China
3.
School of Information Science and Engineering, Southeast University, Nanjing, 210096, China

Funds: The National Natural Science Foundation of China (62471488, 62471486, 62271503, 62071485), The Natural Science Foundation of Jiangsu Province of China (BK20231485)

Received Date: 2024-07-15
Rev Recd Date: 2024-11-26

Available Online: 2024-11-29

Abstract

Abstract

Due to the sharing of communication and sensing waveforms, Integrated Sensing And Communication (ISAC) systems are more vulnerable to the risk of information leakage. The Movable Element Simultaneously Transmitting And Reflecting Reconfigurable Intelligent Surface (ME-STAR-RIS) assisted ISAC system from the perspective of covert communication is investigated in this paper. The ME-STAR-RIS array elements can be moved within a certain range to obtain more favorable channel conditions. Based on the discrete element position model, the joint beamforming optimization problem is formulated which aims to jointly design the active beamforming at the ISAC Base Station (BS) and the flexible passive beamforming (including array element positions, phase shifts, and amplitude coefficients) at the ME-STAR-RIS to maximize the probing beam gain at the sensing target within covert communication quality constraints. A two-layer iterative algorithm is proposed to efficiently solve the active and flexible passive beamforming problem. The simulation results verify the effectiveness of the proposed algorithm and show that by moving the elements, a narrower and stronger detection beam can be obtained, which is conducive to improving the system’s performance.

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References(26)

References

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