94 citations · 103 across the 17 of their papers we have counts for
5 papers · 1 filter
Multiuser Beamforming for Partially-Connected Millimeter Wave Massive MIMO
Chenhao Qi, Jinlin Hu, Yang Du +1
Multiuser beamforming is considered for partially-connected millimeter wave massive MIMO systems. Based on perfect channel state information (CSI), a low-complexity hybrid beamform…
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…
Multibeam Satellite Communications with Energy Efficiency Optimization
Chenhao Qi, Yang Yang, Rui Ding +2
Energy efficiency (EE) is an important aspect of satellite communications. Different with the existing algorithms that typically use the first-order Taylor lower bound approximatio…
Channel Estimation for Wideband MmWave MIMO OFDM System Exploiting Block Sparsity
Yujie Wang, Chenhao Qi, Ping Li +2
In this letter, we investigate time-domain channel estimation for wideband millimeter wave (mmWave) MIMO OFDM system. By transmitting frequency-domain pilot symbols as well as diff…
Two-level Transmission Scheme for Cache-enabled Fog Radio Access Networks
Shiwen He, Chenhao Qi, Yongming Huang +2
In this paper, we investigate the downlink transmission for cache-enabled fog radio access networks aiming at maximizing the delivery rate under the constraints of fronthaul capaci…