5 papers · 1 filter
A Novel Pilot Scheme for Uplink Channel Estimation for Sub-array Structured ELAA in XL-MIMO systems
Yumeng Zhang, Huayan Guo, Vincent Lau
This paper proposes a novel pilot scheme for multi-user uplink channel estimation in extra-large-scale massive MIMO (XL-MIMO) systems with extremely large aperture arrays (ELAA). T…
Channel Estimation and Passive Beamforming for Pixel-based Reconfigurable Intelligent Surfaces with Non-Separable State Response
Huayan Guo, Junhui Rao, Alex M. H. Wong +2
Pixel-based reconfigurable intelligent surfaces (RISs) employ a novel design to achieve high reflection gain at a lower hardware cost by eliminating the phase shifters used in trad…
Channel Estimation and Analog Precoding for Pixel-based Fluid-Antenna-Assisted Multiuser MIMO-OFDM Systems
Huayan Guo, Jichen Zhang, Junhui Rao +2
Pixel-based fluid antennas provide enhanced multiplexing gains and quicker radiation pattern switching than traditional designs. However, this innovation introduces challenges for…
Bayesian Deep End-to-End Learning for MIMO-OFDM System with Delay-Domain Sparse Precoder
Nilesh Kumar Jha, Huayan Guo, Vincent K. N. Lau
This paper introduces a novel precoder design aimed at reducing pilot overhead for effective channel estimation in multiple-input multiple-output orthogonal frequency division mult…
A unified framework for STAR-RIS coefficients optimization
Hancheng Zhu, Yuanwei Liu, Yik Chung Wu +1
Simultaneously transmitting and reflecting (STAR) reconfigurable intelligent surface (RIS), which serves users located on both sides of the surface, has recently emerged as a promi…