Augmented Deep Unfolding for Downlink Beamforming in Multi-cell Massive MIMO with Limited Feedback

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review

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Author(s)

Detail(s)

Original languageEnglish
Title of host publication2022 IEEE Global Communications Conference, GLOBECOM 2022 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers, Inc.
Pages1721-1726
ISBN (electronic)9781665435406
ISBN (print)978-1-6654-3541-3
Publication statusPublished - Dec 2022
Externally publishedYes

Publication series

NameIEEE Global Communications Conference, GLOBECOM - Proceedings

Conference

Title2022 IEEE Global Communications Conference (GLOBECOM 2022)
LocationWindsor Barra Hotel (Hybrid)
PlaceBrazil
CityRio de Janeiro
Period4 - 8 December 2022

Abstract

In limited feedback multi-user multiple-input multiple-output (MU-MIMO) cellular networks, users send quantized information about the channel conditions to the associated base station (BS) for downlink beamforming. However, channel quantization and beamforming have been treated as two separate tasks conventionally, which makes it difficult to achieve global system optimality. In this paper, we propose an augmented deep unfolding (ADU) approach that jointly optimizes the beamforming scheme at the BSs and the channel quantization scheme at the users. In particular, the classic WMMSE beamformer is unrolled and a deep neural network (DNN) is leveraged to preprocess its input to enhance the performance. The variational information bottleneck technique is adopted to further improve the performance when the feedback capacity is strictly restricted. Simulation results demonstrate that the proposed ADU method outperforms all the benchmark schemes in terms of the system average rate.

Citation Format(s)

Augmented Deep Unfolding for Downlink Beamforming in Multi-cell Massive MIMO with Limited Feedback. / Ma, Yifan; Yu, Xianghao; Zhang, Jun et al.
2022 IEEE Global Communications Conference, GLOBECOM 2022 - Proceedings. Institute of Electrical and Electronics Engineers, Inc., 2022. p. 1721-1726 (IEEE Global Communications Conference, GLOBECOM - Proceedings).

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review