138 citations · 253 across the 10 of their papers we have counts for
10 papers
REMAA: Reconfigurable Pixel Antenna-based Electronic Movable-Antenna Arrays for Multiuser Communications
Kangjian Chen, Chenhao Qi, Yujing Hong +1
In this paper, we investigate reconfigurable pixel antenna (RPA)-based electronic movable antennas (REMAs) for multiuser communications. First, we model each REMA as an antenna cha…
DBRAA: Sub-6 GHz and Millimeter Wave Dual-Band Reconfigurable Antenna Array for ISAC
Kangjian Chen, Chenhao Qi, Octavia A. Dobre
This paper proposes a dual-band reconfigurable antenna array (DBRAA), enabling wireless capabilities in both sub-6 GHz (sub-6G) and millimeter wave (mmWave) bands using a single ar…
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…
Simultaneous Beam Training and Target Sensing in ISAC Systems with RIS
Kangjian Chen, Chenhao Qi, Octavia A. Dobre +1
This paper investigates an integrated sensing and communication (ISAC) system with reconfigurable intelligent surface (RIS). Our simultaneous beam training and target sensing (SBTT…
Hierarchical Codebook based Multiuser Beam Training for Millimeter Wave Massive MIMO
Chenhao Qi, Kangjian Chen, Octavia A. Dobre +1
In this paper, multiuser beam training based on hierarchical codebook for millimeter wave massive multi-input multi-output is investigated, where the base station (BS) simultaneous…
Two-Step Codeword Design for Millimeter Wave Massive MIMO Systems with Quantized Phase Shifters
Kangjian Chen, Chenhao Qi, Geoffrey Ye Li
In this paper, a two-step codeword design approach for millimeter wave (mmWave) massive MIMO systems is presented. Ideal codewords are first designed, which ignores the hardware co…
Beam Training based on Dynamic Hierarchical Codebook for Millimeter Wave Massive MIMO
Kangjian Chen, Chenhao Qi
Beam training based on hierarchical codebook for millimeter wave (mmWave) massive MIMO is investigated. Unlike the existing work using the same hierarchical codebook to estimate di…