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Author

Jian Zhu

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Sep 2026

An LSTM-MADDPG Framework for Joint Beamforming Control in STAR-RIS-Assisted Cell-Free Massive MIMO Network

Conventional reconfigurable intelligent surfaces (RIS)-aided cell-free massive multiple-input multiple-output (CF mMIMO) networks are inherently constrained by half-space reflection, which limits coverage expansion and flexible deployment. To overcome this issue, simultaneously transmitting and reflecting reconfigurabl...

Yi-Xuan Mao, Jian Zhu, Lei Feng et al. · 0 citations
2026

Joint Beamforming and Segmentation Optimization for Segmented RIS-Assisted Cell-Free mMIMO Systems Under Perfect and Imperfect CSI

The integration of reconfigurable intelligent surface (RIS) technology with cell-free massive MIMO (CF mMIMO) enhances wireless network sum-rate performance. This paper proposes a novel segmented RIS-assisted CF mMIMO architecture for downlink transmission, where RIS elements within each segment share a common reflecti...

Jian Zhu, Lei Feng, F. Zhou et al. · 0 citations

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