Author

Giuseppe Caire

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Preprint Sep 2026

Prior-Aided Masked Vector Quantization CSI Feedback for FDD Massive MIMO Systems

Downlink channel state information (CSI) feedback is a key bottleneck in frequency-division duplex (FDD) massive MIMO systems, as the user equipment (UE) must convey its estimated channel to the base station (BS) over a limited uplink (UL) budget. To improve CSI reconstruction accuracy under tight feedback constraints,...

Yi Song, Tian-Yu Yang, Kang-Da Zhi et al. · 0 citations

Preprint Sep 2026

Low-Complexity Near-Field Channel Estimation and Subcarrier-Cooperative Hybrid Precoding for Wideband XL-MIMO OFDM Systems

This paper addresses both accurate near-field channel acquisition and scalable precoding for wideband extremely large aperture MIMO (XL-MIMO) OFDM systems, with particular focus on reducing complexity. In the considered system, each MIMO multipath component is characterized by five continuous angle-distance-delay param...

Kang-Da Zhi, Tian-Yu Yang, Song-Yan Xue et al. · 0 citations

Preprint Aug 2026

Spectral-Efficient MIMO-OFDM: Low-Complexity Solution based on Random Multiplexing

This paper presents a low-complexity precoded MIMO-OFDM system for achieving improved spectral efficiency (SE) via intentionally compressing information symbols among subcarriers. Particularly, the proposed scheme leverages the powerful random multiplexing mechanism for precoding, and adopts the linear-complexity ortho...

Jie Yang, Wanchen Hu, Yi Song et al. · 0 citations