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arXiv · 2304.06887

Hierarchically Structured Matrix Recovery-Based Channel Estimation for RIS-Aided Communications

Yabo Guo·Peng Sun·Zhengdao Yuan·Qinghua Guo·Zhongyong Wang
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Abstract

Reconfigurable intelligent surface (RIS) has emerged as a promising technology for improving capacity and extending coverage of wireless networks. In this work, we consider RIS-aided millimeter wave (mmWave) multiple-input and multiple-output (MIMO) communications, where acquiring accurate channel state information is challenging due to the high dimensionality of channels. To fully exploit the structures of the channels, we formulate the channel estimation as a hierarchically structured matrix recovery problem, and design a low-complexity message passing algorithm to solve it. Simulation results demonstrate the superiority of the proposed algorithm and its performance close to the oracle bound.

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Yabo Guo, Peng Sun, Zhengdao Yuan, Qinghua Guo, Zhongyong Wang. 2023-04-14. Hierarchically Structured Matrix Recovery-Based Channel Estimation for RIS-Aided Communications. https://arxiv.org/abs/2304.06887

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