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Two-Phase Efficient Channel Estimation for Passive Double-RIS Assisted MIMO Systems
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DOI：10.1109/LSP.2024.3415594.png)
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摘要
En 中文
In order to improve communication quality in some heavily blocking scenarios, the double-reconfigurable intelligent surface (RIS) is introduced, then there are more channel coefficients to be estimated. To reduce the pilot overhead, an efficient two-phase channel estimation scheme is proposed for passive double-RIS assisted MIMO systems to estimate the dual-reflection cascaded channels. Specifically, RIS 1 operates in a known fixed mode, and RIS 2 operates in a dynamically adjustable mode with the time slot, which can reduce the number of channel coefficients to be estimated. Then, the dual-reflection cascaded channel property is utilized to further reduce pilot overhead. Simulation results illustrate that the proposed scheme significantly reduces the pilot overhead and achieves superior estimation performance simultaneously.
Keyword:
Channel estimation
Vectors
MIMO communication
Wireless communication
Training
Estimation
Accuracy
Channel coefficients
channel estimation
double reconfigurable intelligent surface (DRIS)
pilot overhead
期刊
IF:
9.6
论文数:
1.1W
被引数:
1.7W
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