138 citations · 284 across the 23 of their papers we have counts for
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Precoding Design for Energy Efficiency of Multibeam Satellite Communications
Chenhao Qi, Xin Wang
Instead of merely improving the spectral efficiency (SE), improving the energy efficiency (EE) is another important concern for multibeam satellite systems, due to the power constr…
Beamspace Channel Estimation for Millimeter Wave Massive MIMO System with Hybrid Precoding and Combining
Wenyan Ma, Chenhao Qi
In this paper, a framework of beamspace channel estimation in millimeter wave (mmWave) massive MIMO system is proposed. The framework includes the design of hybrid precoding and 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…
Codeword Selection and Hybrid Precoding for Multiuser Millimeter Wave Massive MIMO Systems
Xuyao Sun, Chenhao Qi
Aiming at maximizing the achievable sum-rate of wideband multiuser mmWave massive MIMO systems, the hybrid precoding is studied. Since each computation of the achievable sum-rate c…
Beam Training and Allocation for Multiuser Millimeter Wave Massive MIMO Systems
Xuyao Sun, Chenhao Qi, Geoffrey Ye Li
We investigate beam training and allocation for multiuser millimeter wave massive MIMO systems. An orthogonal pilot based beam training scheme is first developed to reduce the numb…