RIS-Aided NLoS Monostatic Sensing under Mobility and Angle-Doppler Coupling
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909071157755904 |
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| author | Ercan, Mahmut Kemal Keskin, Musa Furkan Gezici, Sinan Wymeersch, Henk |
| author_facet | Ercan, Mahmut Kemal Keskin, Musa Furkan Gezici, Sinan Wymeersch, Henk |
| contents | We investigate the problem of reconfigurable intelligent surface (RIS)-aided monostatic sensing of a mobile target under line-of-sight (LoS) blockage considering a single antenna, full-duplex, and dual-functional radar-communications base station (BS). For the purpose of target detection and delay/Doppler/angle estimation, we derive a detector based on the generalized likelihood ratio test (GLRT), which entails a high-dimensional parameter search and leads to angle-Doppler coupling. To tackle these challenges, we propose a two-step algorithm for solving the GLRT detector/estimator in a low-complexity manner, accompanied by a RIS phase profile design tailored to circumvent the angle-Doppler coupling effect. Simulation results verify the effectiveness of the proposed algorithm, demonstrating its convergence to theoretical bounds and its superiority over state-of-the-art mobility-agnostic benchmarks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_06544 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | RIS-Aided NLoS Monostatic Sensing under Mobility and Angle-Doppler Coupling Ercan, Mahmut Kemal Keskin, Musa Furkan Gezici, Sinan Wymeersch, Henk Signal Processing We investigate the problem of reconfigurable intelligent surface (RIS)-aided monostatic sensing of a mobile target under line-of-sight (LoS) blockage considering a single antenna, full-duplex, and dual-functional radar-communications base station (BS). For the purpose of target detection and delay/Doppler/angle estimation, we derive a detector based on the generalized likelihood ratio test (GLRT), which entails a high-dimensional parameter search and leads to angle-Doppler coupling. To tackle these challenges, we propose a two-step algorithm for solving the GLRT detector/estimator in a low-complexity manner, accompanied by a RIS phase profile design tailored to circumvent the angle-Doppler coupling effect. Simulation results verify the effectiveness of the proposed algorithm, demonstrating its convergence to theoretical bounds and its superiority over state-of-the-art mobility-agnostic benchmarks. |
| title | RIS-Aided NLoS Monostatic Sensing under Mobility and Angle-Doppler Coupling |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2401.06544 |