37 citations · 50 across the 14 of their papers we have counts for
19 papers
Near-Field Channel Estimation for Extremely Large-Scale Reconfigurable Intelligent Surface (XL-RIS)-Aided Wideband mmWave Systems
Songjie Yang, Chenfei Xie, Wanting Lyu +3
Near-field communications present new opportunities over near-field channels, however, the spherical wavefront propagation makes near-field signal processing challenging. In this c…
Active 3D Double-RIS-Aided Multi-User Communications: Two-Timescale-Based Separate Channel Estimation via Bayesian Learning
Songjie Yang, Wanting Lyu, Yue Xiu +2
Double-reconfigurable intelligent surface (RIS) is a promising technique, achieving a substantial gain improvement compared to single-RIS techniques. However, in double-RIS-aided s…
Energy-Efficient Cell-Free Network Assisted by Hybrid RISs
Wanting Lyu, Yue Xiu, Songjie Yang +2
In this letter, we investigate a cell-free network aided by hybrid reconfigurable intelligent surfaces (RISs), which consists of a mixture of passive and active elements that are c…
Channel Estimation for Reconfigurable Intelligent Surface-Assisted Cell-Free Communications
Songjie Yang, Chenfei Xie, Mingwei Wang +1
Recent research has focused on reconfigurable intelligent surface (RIS)-assisted cell-free systems with the goal of enhancing coverage and lowering the cost of cell-free networks.…
Bayesian Optimization-Based Beam Alignment for MmWave MIMO Communication Systems
Songjie Yang, Baojuan Liu, Zhiqin Hong +1
Due to the very narrow beam used in millimeter wave communication (mmWave), beam alignment (BA) is a critical issue. In this work, we investigate the issue of mmWave BA and present…
Fast Compressive Channel Estimation for MmWave MIMO Hybrid Beamforming Systems
Songjie Yang, Chenfei Xie, Dongli Wang +1
Given the high degree of computational complexity of the channel estimation technique based on the conventional one-dimensional (1-D) compressive sensing (CS) framework employed in…