Journal
IEEE ACCESS
Volume 7, Issue -, Pages 7599-7605Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2018.2887308
Keywords
MIMO; beamforming; deep learning; unsupervised learning; network pruning
Categories
Funding
- Priority Academic Program Development of Jiangsu Higher Education Institutions, National Natural Science Foundation of China [61701258, 61501223, 61501248]
- Jiangsu Specially Appointed Professor Program [RK002STP16001]
- Program for Jiangsu Six Top Talent [XYDXX-010]
- Program for High-Level Entrepreneurial and Innovative Talents Introduction [CZ0010617002]
- Natural Science Foundation of Jiangsu Province [BK20170906]
- Natural Science Foundation of Jiangsu Higher Education Institutions [17KJB510044]
- NUPTSF [XK0010915026]
- 1311 Talent Plan of Nanjing University of Posts and Telecommunications, UK EPSRC [EP/N007840/1]
- Leverhulme Trust [RPG-2017-129]
- EPSRC [EP/N007840/1] Funding Source: UKRI
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In the downlink transmission scenario, power allocation and beamforming design at the transmitter are essential when using multiple antenna arrays. This paper considers a multiple input-multiple output broadcast channel to maximize the weighted sum-rate under the total power constraint. The classical weighted minimum mean-square error (WMMSE) algorithm can obtain suboptimal solutions but involves high computational complexity. To reduce this complexity, we propose a fast beamforming design method using unsupervised learning, which trains the deep neural network (DNN) offline and provides real-time service online only with simple neural network operations. The training process is based on an end-to-end method without labeled samples avoiding the complicated process of obtaining labels. Moreover, we use the APoZ -based pruning algorithm to compress the network volume, which further reduces the computational complexity and volume of the DNN, making it more suitable for low computation-capacity devices. Finally, the experimental results demonstrate that the proposed method improves computational speed significantly with performance close to the WMMSE algorithm.
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