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Two-timescale hybrid analog-digital beamforming for mmWave full-duplex MIMO multiple-relay aided systems

Two-timescale hybrid analog-digital beamforming for mmWave full-duplex MIMO multiple-relay aided systems
Two-timescale hybrid analog-digital beamforming for mmWave full-duplex MIMO multiple-relay aided systems
Due to the severe pathloss experienced by electromagnetic wave transmission in the mmWave band, one challenge for the design of millimeter wave (mmWave) communication systems is coverage extension. Aiming to improve the coverage and sum rate performance of mmWave communications, we investigate new schemes for the design of full-duplex (FD) mmWave multiple-input multiple-output (MIMO) multiple-relay systems. Specifically, we propose a novel two-timescale analog-digital hybrid beamforming scheme to maximize the sum rate, while reducing the system complexity and channel state information (CSI) signalling overhead, as well as mitigating the effects of self interference and CSI errors caused by the delays. In the proposed scheme, the long-timescale analog beamforming matrices are designed based on the available channel statistics and updated in a frame-based manner, where a frame contains a fixed number of time slots, while for each time slot, the short-timescale digital beamforming matrices are optimized based on low-dimensional effective CSI matrices available in real-time. We develop an effective analog beamforming algorithm based on the cut-set bound and stochastic successive convex approximation (SSCA) and an innovative digital beamforming algorithm that relies on the theory of penalty dual decomposition (PDD) to maximize the system sum rate. The convergence properties and computational complexity of the proposed algorithms are also examined. Our simulation results show that the proposed two-timescale hybrid beamforming design significantly outperforms the conventional beamforming algorithms both in terms of the CSI-signalling overhead and the achievable sum rate in the presence of CSI delays.
0733-8716
Cai, Yunlong
44a85b9f-185b-4078-aecd-02df90f5eab6
Xu, Kaidi
650e0ed4-309f-4845-8c35-dcd34a4cb8c7
Liu, An
74769859-8fe6-4f56-b2c9-c0f23b7b7e24
Zhao, Minjian
f54fc4f3-6e99-4c54-bc6f-0f974d696e35
Champagne, Benoit
28d389b9-b5b1-48c3-8eeb-5dd3e4ae9edb
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Cai, Yunlong
44a85b9f-185b-4078-aecd-02df90f5eab6
Xu, Kaidi
650e0ed4-309f-4845-8c35-dcd34a4cb8c7
Liu, An
74769859-8fe6-4f56-b2c9-c0f23b7b7e24
Zhao, Minjian
f54fc4f3-6e99-4c54-bc6f-0f974d696e35
Champagne, Benoit
28d389b9-b5b1-48c3-8eeb-5dd3e4ae9edb
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Cai, Yunlong, Xu, Kaidi, Liu, An, Zhao, Minjian, Champagne, Benoit and Hanzo, Lajos (2020) Two-timescale hybrid analog-digital beamforming for mmWave full-duplex MIMO multiple-relay aided systems. IEEE Journal on Selected Areas in Communications. (In Press)

Record type: Article

Abstract

Due to the severe pathloss experienced by electromagnetic wave transmission in the mmWave band, one challenge for the design of millimeter wave (mmWave) communication systems is coverage extension. Aiming to improve the coverage and sum rate performance of mmWave communications, we investigate new schemes for the design of full-duplex (FD) mmWave multiple-input multiple-output (MIMO) multiple-relay systems. Specifically, we propose a novel two-timescale analog-digital hybrid beamforming scheme to maximize the sum rate, while reducing the system complexity and channel state information (CSI) signalling overhead, as well as mitigating the effects of self interference and CSI errors caused by the delays. In the proposed scheme, the long-timescale analog beamforming matrices are designed based on the available channel statistics and updated in a frame-based manner, where a frame contains a fixed number of time slots, while for each time slot, the short-timescale digital beamforming matrices are optimized based on low-dimensional effective CSI matrices available in real-time. We develop an effective analog beamforming algorithm based on the cut-set bound and stochastic successive convex approximation (SSCA) and an innovative digital beamforming algorithm that relies on the theory of penalty dual decomposition (PDD) to maximize the system sum rate. The convergence properties and computational complexity of the proposed algorithms are also examined. Our simulation results show that the proposed two-timescale hybrid beamforming design significantly outperforms the conventional beamforming algorithms both in terms of the CSI-signalling overhead and the achievable sum rate in the presence of CSI delays.

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Accepted/In Press date: 15 February 2020

Identifiers

Local EPrints ID: 438386
URI: http://eprints.soton.ac.uk/id/eprint/438386
ISSN: 0733-8716
PURE UUID: 551c7c1a-c4e5-4fe4-aec1-28dad183fd81
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 09 Mar 2020 17:30
Last modified: 09 Nov 2022 05:01

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Contributors

Author: Yunlong Cai
Author: Kaidi Xu
Author: An Liu
Author: Minjian Zhao
Author: Benoit Champagne
Author: Lajos Hanzo ORCID iD

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