A RIS-Based Passive DOA Estimation Method for Integrated Sensing and Communication System

Chen, Zhimin; Chen, Peng; Wang, Xianbin

doi:10.48550/arxiv.2204.11626

Cited by 2 publications

(2 citation statements)

References 33 publications

(37 reference statements)

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“…G ∈ C N ×M is the measurement matrix containing the magnitudes and phases information of the reflectors. The sensor serves as the reception of reflected signal r ∈ C N ×1 from RIS, expressed as [15]…”

Section: The Ris-based Sensing System Modelmentioning

confidence: 99%

Joint Squared-Sine Function and ANM DOA Estimation for RIS-Based Sensing Systems

Li¹

2023

Preprint

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<p>Reconfigurable intelligent surface (RIS) is an emerging technology for improving the performance of wireless communications. In this letter, a joint Squared-Sine function and atomic norm minimization (ANM), denoted as SS-ANM, is proposed for passive sensing assisted by RIS in wireless communication systems interfered by a wireless access point (AP). The proposed joint optimization is used to estimate the targets' direction-of-arrival (DOA), employing the spatial domain sparsity of the received signals. The optimal solution is achieved from the alternating direction method of multipliers (ADMM). With the help of the Squared-Sine function as the cost function, the proposed solution provides better estimation accuracy under various noises besides Gaussian noise, and meanwhile requires a lower computation complexity. Simulation results verify the superiority of the proposed joint minimization over existing DOA estimation methods.</p>

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Section: The Ris-based Sensing System Modelmentioning

confidence: 99%

Joint Squared-Sine Function and ANM DOA Estimation for RIS-Based Sensing Systems

Li¹

2023

Preprint

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“…Then, with N time slots and K targets, the received signal r ∈ C N ×1 in the sensor can be expressed as [15]…”

Section: The Ris-based Sensing System Modelmentioning

confidence: 99%

RIS-ADMM: An ADMM-Based Passive and Sparse Sensing Method with Interference Removal

Chen¹,

Chen²,

Miao³

et al. 2022

Preprint

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The reconfigurable intelligent surface (RIS) has been a potential technology for future radar and wireless communication applications. In this letter, the passive sensing problem using wireless communications signal and RIS is addressed in the scenario with the interference from the wireless access point (AP). An atomic norm minimization (ANM) method is formulated to exploit the target sparsity in the spatial domain and estimate the direction of arrival (DOA), but the conventional semidefinite programming (SDP)-based method to solve the ANM problem is complex and cannot be realized efficiently. Therefore, we proposed a RIS-ADMM method as an alternating direction method of multipliers (ADMM)-based iterative method. The closed-form expressions are derived, and the interference signal is also suppressed. Simulation results show that the proposed RIS-ADMM method outperforms the compared methods in the DOA estimation performance with low computational complexity. The code about the proposed method is avaliable online https://github.com/chenpengseu/RIS-ADMM.git.

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A RIS-Based Passive DOA Estimation Method for Integrated Sensing and Communication System

Cited by 2 publications

References 33 publications

Joint Squared-Sine Function and ANM DOA Estimation for RIS-Based Sensing Systems

Joint Squared-Sine Function and ANM DOA Estimation for RIS-Based Sensing Systems

RIS-ADMM: An ADMM-Based Passive and Sparse Sensing Method with Interference Removal

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