5 papers · 1 filter
Customizing Wireless Channels via Intelligent Reflecting Surfaces: Feasibility, Fundamental Limits, and Constructive Design
Xiyuan Liu, Qingqing Wu, Guangji Chen +2
By adjusting their reflection coefficients, intelligent reflecting surfaces (IRSs) can reshape the channels between a base station (BS) and user equipment (UE). Existing studies ma…
Sparse Rotatable Arrays (SRA): Unifying Array Aperture and Antenna Directivity for Wireless Communications
Ailing Zheng, Qingqing Wu, Xiyuan Liu +1
Sparse rotatable array (SRA) is a novel reconfigurable antenna architecture that jointly exploits sparse aperture configuration and antenna directivity to enhance spatial resolutio…
Continuous Wavefront Design via Virtual Point Sources: A Holographic Paradigm for Near-Field XL-MIMO
Xiyuan Liu, Qingqing Wu, Rui Wang +2
Beamforming design for extremely large-scale multiple-input multiple-output (XL-MIMO) systems is challenging due to prohibitive computational complexity and complex near-field prop…
Low Time Complexity Near-Field Channel and Position Estimations
Xiyuan Liu, Qingqing Wu, Rui Wang +1
With the application of high-frequency communication and extremely large MIMO (XL-MIMO), the near-field effect has become increasingly apparent. The near-field channel estimation a…
A Near Field Low Time Complexity Beam Training Scheme Based on Spatial Orthogonal Decomposition
Xiyuan Liu, Qingqing Wu, Rui Wang +1
With the application of high-frequency communication and extremely large MIMO (XL-MIMO), the near-field effect has become increasingly apparent. The near-field beam design now requ…