233 citations · 785 across the 38 of their papers we have counts for
6 papers · 1 filter
Randomly-Directional Beamforming in Millimeter-Wave Multi-User MISO Downlink
Gilwon Lee, Youngchul Sung, Junyeong Seo
In this paper, randomly-directional beamforming (RDB) is considered for millimeter-wave (mmwave) multi-user (MU) multiple-input single-output (MISO) downlink systems. By using asym…
Two-Stage Beamformer Design for Massive MIMO Downlink By Trace Quotient Formulation
Donggun Kim, Gilwon Lee, Youngchul Sung
In this paper, the problem of outer beamformer design based only on channel statistic information is considered for two-stage beamforming for multi-user massive MIMO downlink, and…
Training Beam Sequence Design for Millimeter-Wave MIMO Systems: A POMDP Framework
Junyeong Seo, Youngchul Sung, Gilwon Lee +1
In this paper, adaptive training beam sequence design for efficient channel estimation in large millimeter-wave(mmWave) multiple-input multiple-output (MIMO) channels is considered…
Pilot Beam Sequence Design for Channel Estimation in Millimeter-Wave MIMO Systems: A POMDP Framework
Junyeong Seo, Youngchul Sung, Gilwon Lee +1
In this paper, adaptive pilot beam sequence design for channel estimation in large millimeter-wave (mmWave) MIMO systems is considered. By exploiting the sparsity of mmWave MIMO ch…
Pilot Signal Design for Massive MIMO Systems: A Received Signal-To-Noise-Ratio-Based Approach
Jungho So, Donggun Kim, Yuni Lee +1
In this paper, the pilot signal design for massive MIMO systems to maximize the training-based received signal-to-noise ratio (SNR) is considered under two channel models: block Ga…
A New Approach to User Scheduling in Massive Multi-User MIMO Broadcast Channels
Gilwon Lee, Youngchul Sung
In this paper, a new user-scheduling-and-beamforming method is proposed for multi-user massive multiple-input multiple-output (massive MIMO) broadcast channels in the context of tw…