8 papers · 1 filter
Joint Optimization of Flexible Antenna Array Shape and Beamforming for Secure Communication
Zhen Xu, Gaojie Chen, Jing Zhu +4
Flexible antenna arrays (FAAs) can physically reshape their geometry to add new spatial degrees of freedom, whereas transmit beamforming adjusts the complex element weights to elec…
Flexible Reconfigurable Intelligent Surface-Aided Covert Communications in UAV Networks
Chong Huang, Gaojie Chen, Zhuoao Xu +4
In recent years, unmanned aerial vehicles (UAVs) have become a key role in wireless communication networks due to their flexibility and dynamic adaptability. However, the openness…
Uplink SCMA-empowered Uncoordinated Random Access for Future mMTC
Pengyu Gao, Qu Luo, Jing Zhu +3
In this paper, a novel uncoordinated random access (URA) protocol is presented to address the pressing demand for massive connectivity with low access latency in future massive mac…
Hybrid Beamforming for RIS-Assisted Multiuser Fluid Antenna Systems
Jiangong Chen, Yue Xiao, Zhendong Peng +4
Recent advances in reconfigurable antennas have led to the new concept of the fluid antenna system (FAS) for shape and position flexibility, as another degree of freedom for wirele…
Amplitude-Domain Reflection Modulation for Active RIS-Assisted Wireless Communications
Jing Zhu, Qu, Luo +5
In this paper, we propose a novel active reconfigurable intelligent surface (RIS)-assisted amplitude-domain reflection modulation (ADRM) transmission scheme, termed as ARIS-ADRM. T…
Joint Sparse Graph for Enhanced MIMO-AFDM Receiver Design
Qu Luo, Jing Zhu, Zilong Liu +4
Affine frequency division multiplexing (AFDM) is a promising chirp-assisted multicarrier waveform for future high-mobility communications. This paper is devoted to enhanced receive…
Single Sparse Graph Enhanced Expectation Propagation Algorithm Design for Uplink MIMO-SCMA
Qu Luo, Jing Zhu, Gaojie Chen +2
Sparse code multiple access (SCMA) and multiple input multiple output (MIMO) are considered as two efficient techniques to provide both massive connectivity and high spectrum effic…
Advanced Nonlinear SCMA Codebook Design Based on Lattice Constellations
Qu Luo, Jing Zhu, Gaojie Chen +2
The design of efficient sparse codebooks in sparse code multiple access (SCMA) system have attracted tremendous research attention in the past few years. This paper proposes a nove…