20 citations · 20 across the 6 of their papers we have counts for
6 papers
Beam Switching Based Beam Design for High-Speed Train mmWave Communications
Jingjia Huang, Chenhao Qi, Octavia A. Dobre +1
For high-speed train (HST) millimeter wave (mmWave) communications, the use of narrow beams with small beam coverage needs frequent beam switching, while wider beams with small bea…
Near-Field Communications for Extremely Large-Scale MIMO: A Beamspace Perspective
Kangjian Chen, Chenhao Qi, Jingjia Huang +2
Extremely large-scale multiple-input multiple-output (XL-MIMO) is regarded as one of the key techniques to enhance the performance of future wireless communications. Different from…
Near-Field Multiuser Communications based on Sparse Arrays
Kangjian Chen, Chenhao Qi, Geoffrey Ye Li +1
This paper considers near-field multiuser communications based on sparse arrays (SAs). First, for the uniform SAs (USAs), we analyze the beam gains of channel steering vectors, whi…
Triple-Refined Hybrid-Field Beam Training for mmWave Extremely Large-Scale MIMO
Kangjian Chen, Chenhao Qi, Octavia A. Dobre +1
This paper investigates beam training for extremely large-scale multiple-input multiple-output systems. By considering both the near field and far field, a triple-refined hybrid-fi…
Beam Training and Tracking for Extremely Large-Scale MIMO Communications
Kangjian Chen, Chenhao Qi, Cheng-Xiang Wang +1
In this paper, beam training and beam tracking are investigated for extremely large-scale multiple-input-multiple-output communication systems with partially-connected hybrid combi…
Key Issues in Wireless Transmission for NTN-Assisted Internet of Things
Chenhao Qi, Jing Wang, Leyi Lyu +3
Non-terrestrial networks (NTNs) have become appealing resolutions for seamless coverage in the next-generation wireless transmission, where a large number of Internet of Things (Io…