This letter studies multiuser (MU) downlink polarforming with equal-amplitude, phase-only polarization-reconfigurable antennas (PRAs), each driven by a single radio-frequency (RF) chain. At each base station (BS) antenna, one polarization phase is shared by all transmitted streams, while digital precoding remains user-...
D. N. Tuan, Su Van Pham, Quyen An Duong et al.· IEEE Wireless Communications...· 0 citations
Near-field multiuser hybrid beamforming (HBF) requires joint angle-distance codebooks whose size, and hence reporting overhead, grows with the array aperture. For the extremely large array considered here, reporting one quality metric per codeword already incurs more overhead than full channel state information (CSI) f...
T. Van Le, Ngoc-Thanh Nguyen, Nam Van Dinh et al.· 0 citations
Extremely large-scale array (XL-array) is envisioned as a key technology for future terahertz (THz) communication networks. However, the near-field beam split effect severely degrades beam training performance in wideband THz XL-array systems. In this letter, we reveal that the near-field array gain is considerably mor...
Ke Huang, Jian-He Du, Jing-Yi Guan et al.· IEEE Wireless Communications...· 0 citations
A comprehensive System-Level Simulation framework for assessing the performance of multi-user multiple-input multiple-output (MIMO) systems in indoor hotspot environments, following the standardized 3rd generation partnership project (3GPP) InH_B channel model is proposed.
T. Van Le, Nam Van Dinh, Ngoc-Thanh Nguyen et al.· Advanced Information and Com...· 0 citations
Simulations show that the effective SINR of OTFS changes 37.8% less per frame than that of orthogonal frequency division multiplexing (OFDM) at 70 m/s under the same numerology, and that the waveform contribution to the usefulness of stale SINR feedback increases with mobility.
T. Van Le, Luong Cong Nguyen, Trong-Dai Hoang et al.· 0 citations
This paper proposes a mobility- and feedback-aware multi-level refinement strategy, termed MLR-TG, to improve robustness without always-on candidate search for multi-user large multiple-input multiple-output millimeter-wave unmanned aerial vehicle (UAV) downlink systems under mobility-induced channel aging and delayed...
T. Van Le, Luong Cong Nguyen, Xing-Wang Li et al.· 0 citations
A systematic review of HBF techniques for NTN systems, with emphasis on LEO satellite and UAV communications, and introduces common HBF architectures, signal models, channel representations, analog and digital precoder designs, and learning-aided approaches that form the shared technical foundation of existing works.
T. Van Le, Luong Cong Nguyen, H. T. Nguyen et al.· 0 citations
Satellite-terrestrial integrated networks with simultaneous wireless information and power transfer (SWIPT) provide wide-area connectivity and sustainable service support, but they also face serious security challenges due to the broadcast nature of satellite links and the possibility that an energy receiver may act as...
Meng-Yan Huang, Xing-Wang Li, Chengjun Jiang et al.· IEEE Journal on Selected Are...· 0 citations
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