Pilot-to-Data Power Ratio in RIS-Assisted Multiantenna Communication
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909710763950080 |
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| author | Sadeghian, Masoud Lozano, Angel Fodor, Gabor |
| author_facet | Sadeghian, Masoud Lozano, Angel Fodor, Gabor |
| contents | The optimization of the \gls{pdpr} is a recourse that helps wireless systems to acquire channel state information while minimizing the pilot overhead. While the optimization of the \gls{pdpr} in cellular networks has been studied extensively, the effect of the \gls{pdpr} in \gls{ris}-assisted networks has hardly been examined. This paper tackles this optimization when the communication is assisted by a RIS whose phase shifts are adjusted on the basis of the statistics of the channels. For a setting representative of a macrocellular deployment, the benefits of optimizing the PDPR are seen to be significant over a broad range of operating conditions. These benefits, demonstrated through the ergodic minimum mean squared error, for which a closed-form solution is derived, become more pronounced as the number of RIS elements and/or the channel coherence grow large. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_21785 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Pilot-to-Data Power Ratio in RIS-Assisted Multiantenna Communication Sadeghian, Masoud Lozano, Angel Fodor, Gabor Information Theory Signal Processing The optimization of the \gls{pdpr} is a recourse that helps wireless systems to acquire channel state information while minimizing the pilot overhead. While the optimization of the \gls{pdpr} in cellular networks has been studied extensively, the effect of the \gls{pdpr} in \gls{ris}-assisted networks has hardly been examined. This paper tackles this optimization when the communication is assisted by a RIS whose phase shifts are adjusted on the basis of the statistics of the channels. For a setting representative of a macrocellular deployment, the benefits of optimizing the PDPR are seen to be significant over a broad range of operating conditions. These benefits, demonstrated through the ergodic minimum mean squared error, for which a closed-form solution is derived, become more pronounced as the number of RIS elements and/or the channel coherence grow large. |
| title | Pilot-to-Data Power Ratio in RIS-Assisted Multiantenna Communication |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2507.21785 |