RIS-Assisted Joint Waveform Design for PAPR-Aware AAV-Enabled Integrated Sensing and Communication

Reconfigurable Intelligent Surface (RIS)-assisted Autonomous Aerial Vehicle (AAV)-enabled Integrated Sensing and Communication (ISAC) systems have received wide attention due to flexible mobility of AAVs and auxiliary links provided by RIS. However, the existing works usually neglect the peak-to-ave...

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Published inIEEE transactions on vehicular technology Vol. 74; no. 7; pp. 10480 - 10494
Main Authors Gu, Meng, Liu, Yaxi, He, Boxin, Huangfu, Wei, Long, Keping
Format Journal Article
LanguageEnglish
Published IEEE 01.07.2025
Subjects
alternating direction method of multipliers
Autonomous aerial vehicles
Convex functions
Downlink
Integrated sensing and communication
Interference
multiuser interference
Optimization
peak average power ratio
Peak to average power ratio
Radar
reconfigurable intelligent surface
Reconfigurable intelligent surfaces
Wireless communication
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Abstract Reconfigurable Intelligent Surface (RIS)-assisted Autonomous Aerial Vehicle (AAV)-enabled Integrated Sensing and Communication (ISAC) systems have received wide attention due to flexible mobility of AAVs and auxiliary links provided by RIS. However, the existing works usually neglect the peak-to-average power ratio (PAPR), a key communication performance metric that reflects amplifier efficiency, interference levels, and equipment costs. Motivated by this, we consider PAPR constraints in RIS-assisted AAV-enabled ISAC system. An optimization for joint beamforming and RIS phase-shift matrices design is established, with the goal of minimizing the weighted sum of the multiuser interference (MUI) for communication and sensing beam pattern mismatch (BPM), subject to PAPR constraints, power constraints, ideal beam direction approximation constraints, and constant mode constraints on the phase-shift matrices. To tackle this non-convex problem, a multivariate cyclic iterative alternating-direction multiplier method (MCI-ADMM) is adopted to decouple the original problem into three sub-problems regarding three variables. Some mathematical techniques are adopted to solve these sub-problems, including augmented lagrangian, constraint reconstruction method based on orthogonal Procrustes problem, manifold optimization, quadratic representation, and variable substitution. The experimental results show inherent trade-offs between dual functionalities under PAPR constraints. In addition, the consideration of PAPR performs better system performance compared with baselines. Also, the stability and reliability under different parameters settings are verified.
AbstractList Reconfigurable Intelligent Surface (RIS)-assisted Autonomous Aerial Vehicle (AAV)-enabled Integrated Sensing and Communication (ISAC) systems have received wide attention due to flexible mobility of AAVs and auxiliary links provided by RIS. However, the existing works usually neglect the peak-to-average power ratio (PAPR), a key communication performance metric that reflects amplifier efficiency, interference levels, and equipment costs. Motivated by this, we consider PAPR constraints in RIS-assisted AAV-enabled ISAC system. An optimization for joint beamforming and RIS phase-shift matrices design is established, with the goal of minimizing the weighted sum of the multiuser interference (MUI) for communication and sensing beam pattern mismatch (BPM), subject to PAPR constraints, power constraints, ideal beam direction approximation constraints, and constant mode constraints on the phase-shift matrices. To tackle this non-convex problem, a multivariate cyclic iterative alternating-direction multiplier method (MCI-ADMM) is adopted to decouple the original problem into three sub-problems regarding three variables. Some mathematical techniques are adopted to solve these sub-problems, including augmented lagrangian, constraint reconstruction method based on orthogonal Procrustes problem, manifold optimization, quadratic representation, and variable substitution. The experimental results show inherent trade-offs between dual functionalities under PAPR constraints. In addition, the consideration of PAPR performs better system performance compared with baselines. Also, the stability and reliability under different parameters settings are verified.
Author Liu, Yaxi
Gu, Meng
Huangfu, Wei
Long, Keping
He, Boxin
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Snippet Reconfigurable Intelligent Surface (RIS)-assisted Autonomous Aerial Vehicle (AAV)-enabled Integrated Sensing and Communication (ISAC) systems have received...
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SubjectTerms alternating direction method of multipliers
Autonomous aerial vehicles
Convex functions
Downlink
Integrated sensing and communication
Interference
multiuser interference
Optimization
peak average power ratio
Peak to average power ratio
Radar
reconfigurable intelligent surface
Reconfigurable intelligent surfaces
Wireless communication
Title RIS-Assisted Joint Waveform Design for PAPR-Aware AAV-Enabled Integrated Sensing and Communication
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