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Open access Sep 2026

Robust beamforming design for NOMA system assisted by STAR-RIS

Numerical results show that the proposed impairment-aware STAR-RIS-NOMA design achieves higher sum rates and lower bit error rates than the considered hardware-impairment-unaware benchmarks.

Kun-Yu Li, Guo-Ping Zhang, Hong-Bo Xu et al. · 0 citations
Open access 2026

Capacity Maximization for 6DMA- and STAR-RIS-Enhanced Wireless Networks via Spatial Multiplexing and Directional Modulation

Simulation results show that the proposed method can significantly improve the sum rate of users as compared to benchmark with FPA + Optimized STAR-RIS, 6DMA + Random STAR-RIS, and FPA + Random STAR-RIS.

Yuewei Wu, Ming-Hao Chen, Jing-Jing Yang et al. · 0 citations
#graph neural networks Open access Sep 2026

Digital Twin-Assisted Beamforming for Millimeter Wave Massive MIMO

Numerical results demonstrate that the proposed DT-assisted approach significantly reduces online interaction overhead by shifting the computational burden of ray-tracing to an offline generative phase, and achieves superior sum-rate performance and link robustness under dynamic blockages compared to conventional deep...

Ke Xu, Wei-Qiang Wu · 0 citations
Open access Aug 2026

Scalable RIS-aided hybrid beamforming for mmWave systems enables multiple sub-array architectures: A Geometric Mean Approach

This paper investigates a reconfigurable intelligent surface (RIS)-aided hybrid beamforming (HBF) framework for downlink multi-user millimeter-wave systems operating under practical hardware constraints, and develops a hardware-constrained optimization problem to maximize the geometric mean (GM) of user rates, thereby...

H. M. Tran, T. V. Dinh, H. T. Nguyen et al. · 0 citations
Preprint Sep 2026

Analytical Framework of Radial Resolution for Near-Field Communications

As extremely large antenna arrays (ELAAs) become central to next-generation wireless systems, the transition into the near-field propagation regime enables the exploitation of spherical wavefronts for radial-domain beamfocusing. This capability is pivotal for emerging applications requiring precise spatial isolation, s...

V. Centritto, S. Droulias, Angeliki Alexiou · 1 citation
2026

Hybrid Beamforming Optimization for Near-Field Terahertz Multi-User System With FTTDs

In this paper, we investigate beamforming for a wideband terahertz (THz) communication system serving multiple users in the near-field region. A hybrid beamforming architecture employing fixed true time delays (FTTDs) and phase shifters (PSs) is introduced to reduce the spatial wideband effect. Both fully-connected (FC...

Wen-Qiang Chu, Qiu-Yan Liu, Yan-Xia Cao et al. · 0 citations

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