Performance Analysis on RIS-Aided Wideband Massive MIMO OFDM Systems with Low-Resolution ADCs
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913264531668992 |
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| author | Chen, Xianzhe Ren, Hong Pan, Cunhua Peng, Zhangjie Zhi, Kangda Liu, Yong Xi, Xiaojun Armada, Ana Garcia Wang, Cheng-Xiang |
| author_facet | Chen, Xianzhe Ren, Hong Pan, Cunhua Peng, Zhangjie Zhi, Kangda Liu, Yong Xi, Xiaojun Armada, Ana Garcia Wang, Cheng-Xiang |
| contents | This paper investigates a reconfigurable intelligent surface (RIS)-aided wideband massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with low-resolution analog-to-digital converters (ADCs). Frequency-selective Rician fading channels are considered, and the OFDM data transmission process is presented in time domain. This paper derives the closed-form approximate expression of the uplink achievable rate, based on which the asymptotic system performance is analyzed when the number of the antennas at the base station and the number of reflecting elements at the RIS grow to infinity. Besides, the power scaling laws of the considered system are revealed to provide energy-saving insights. Furthermore, this paper proposes a gradient ascent-based algorithm to design the phase shifts of the RIS for maximizing the minimum user rate. Finally, numerical results are presented to verify the correctness of analytical conclusions and draw insights. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_09058 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Performance Analysis on RIS-Aided Wideband Massive MIMO OFDM Systems with Low-Resolution ADCs Chen, Xianzhe Ren, Hong Pan, Cunhua Peng, Zhangjie Zhi, Kangda Liu, Yong Xi, Xiaojun Armada, Ana Garcia Wang, Cheng-Xiang Information Theory Signal Processing This paper investigates a reconfigurable intelligent surface (RIS)-aided wideband massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with low-resolution analog-to-digital converters (ADCs). Frequency-selective Rician fading channels are considered, and the OFDM data transmission process is presented in time domain. This paper derives the closed-form approximate expression of the uplink achievable rate, based on which the asymptotic system performance is analyzed when the number of the antennas at the base station and the number of reflecting elements at the RIS grow to infinity. Besides, the power scaling laws of the considered system are revealed to provide energy-saving insights. Furthermore, this paper proposes a gradient ascent-based algorithm to design the phase shifts of the RIS for maximizing the minimum user rate. Finally, numerical results are presented to verify the correctness of analytical conclusions and draw insights. |
| title | Performance Analysis on RIS-Aided Wideband Massive MIMO OFDM Systems with Low-Resolution ADCs |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2403.09058 |