4 papers
ReFLEX: Length-Generalizable CSI Denoising for MIMO-OFDM via Relative-Frequency Bias
Zhibin Zhang, Robert Potekhin, Ziwei Wan +2
This letter studies CSI denoising for MIMO--OFDM with variable NR resource block (RB) allocations. ReFLEX is a length-generalizable Transformer whose frequency attention uses a rel…
Reconfigurable Intelligent Surface Empowered Full Duplex Systems: Opportunities and Challenges
Chong Huang, Yun Wen, Long Zhang +3
Reconfigurable intelligent surfaces (RISs) have emerged as a promising technology in wireless communications. Simultaneously transmitting and reflecting RIS (STAR-RISs) in particul…
Near-Space Communications: the Last Piece of 6G Space-Air-Ground-Sea Integrated Network Puzzle
Hongshan Liu, Tong Qin, Zhen Gao +16
This article presents a comprehensive study on the emerging near-space communications (NS-COM) within the context of space-air-ground-sea integrated network (SAGSIN). Specifically,…
AFDM-SCMA: A Promising Waveform for Massive Connectivity over High Mobility Channels
Qu Luo, Pei Xiao, Zilong Liu +4
This paper studies the affine frequency division multiplexing (AFDM)-empowered sparse code multiple access (SCMA) system, referred to as AFDM-SCMA, for supporting massive connectiv…