Hybrid beamforming for multi-user millimeter-wave networks
Hybrid beamforming for multi-user millimeter-wave networks
This paper considers hybrid beamforming by combining an analog beamformer with a new regularized zero forcing baseband one, for multi-user millimeter-wave networks under a limited number of radio frequency (RF) chains. Three popular scenarios are examined: i) the number of users is up to the number of RF chains in a single-cell network, ii) the number of users is up to twice the number of RF chains in a single-cell network, and iii) the number of users is up to twice the number of RF chains in each cell of a two-cell network. In the second and third scenarios, we group the users into two categories of cell-center users as well as cell-edge users and serve them in two different time fractions. In the third scenario, we propose to suppress the inter-cell interference by serving the cell-center and cell-edge users in alternate fractional-time slots. In all the three scenarios, we determine the optimal power allocation maximizing the users’ minimum rate. Finally, low-complexity path-following algorithms having rapid convergence are developed for the computation of the optimal power. Our simulation results show that the proposed algorithms achieve a clear performance gain over the existing benchmarkers.
Millimeter-wave communications, analog beamforming, baseband beamforming, hybrid beamforming, nonconvex optimization algorithms, regularized zero-forcing beamforming
2943-2956
Nasir, A.A.
d97ca733-e302-4089-83a2-3909ca148380
Tuan, H.D.
5bcfb405-e76a-4cb1-bc66-19eb4b9fe2a5
Duong, T.Q.
53088e83-7473-4a92-b244-a56dc61506f8
Poor, H. Vincent
2450f17a-1b3d-4eef-ba7e-111f75631764
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
March 2020
Nasir, A.A.
d97ca733-e302-4089-83a2-3909ca148380
Tuan, H.D.
5bcfb405-e76a-4cb1-bc66-19eb4b9fe2a5
Duong, T.Q.
53088e83-7473-4a92-b244-a56dc61506f8
Poor, H. Vincent
2450f17a-1b3d-4eef-ba7e-111f75631764
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Nasir, A.A., Tuan, H.D., Duong, T.Q., Poor, H. Vincent and Hanzo, Lajos
(2020)
Hybrid beamforming for multi-user millimeter-wave networks.
IEEE Transactions on Vehicular Technology, 69 (3), , [8957245].
(doi:10.1109/TVT.2020.2966122).
Abstract
This paper considers hybrid beamforming by combining an analog beamformer with a new regularized zero forcing baseband one, for multi-user millimeter-wave networks under a limited number of radio frequency (RF) chains. Three popular scenarios are examined: i) the number of users is up to the number of RF chains in a single-cell network, ii) the number of users is up to twice the number of RF chains in a single-cell network, and iii) the number of users is up to twice the number of RF chains in each cell of a two-cell network. In the second and third scenarios, we group the users into two categories of cell-center users as well as cell-edge users and serve them in two different time fractions. In the third scenario, we propose to suppress the inter-cell interference by serving the cell-center and cell-edge users in alternate fractional-time slots. In all the three scenarios, we determine the optimal power allocation maximizing the users’ minimum rate. Finally, low-complexity path-following algorithms having rapid convergence are developed for the computation of the optimal power. Our simulation results show that the proposed algorithms achieve a clear performance gain over the existing benchmarkers.
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Accepted/In Press date: 8 January 2020
Published date: March 2020
Additional Information:
Funding Information:
Manuscript received August 23, 2019; revised December 6, 2019; accepted January 8, 2020. Date of publication January 13, 2020; date of current version March 12, 2020. The work of A. A. Nasir was supported by the KFUPM Research Project SB171005. The work of H. D. Tuan was supported in part by the Institute for Computational Science and Technology, Hochiminh City, Vietnam, and in part by the Australian Research Council’s Discovery Projects under Project DP190102501. The work of T. Q. Duong was supported by U.K. Royal Academy of Engineering Research Fellowship under Grant RF1415\14\22. The work of H. V. Poor was supported by the U.S. National Science Foundation under Projects CCF-1513915 and CCF-1908308. The work of L. Hanzo was supported in part by the Engineering and Physical Sciences Research Council under Grants EP/N004558/1, EP/PO34284/1, and COALESCE, of the Royal Society’s Global Challenges Research Fund Grant, and in part by the European Research Council’s Advanced Fellow Grant QuantCom. The review of this article was coordinated by Dr. C. Yuen. (Corresponding author: Lajos Hanzo.) A. A. Nasir is with the Department of Electrical Engineering, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 34464, Saudi Arabia (e-mail: anasir@kfupm.edu.sa).
Publisher Copyright:
© 1967-2012 IEEE.
Keywords:
Millimeter-wave communications, analog beamforming, baseband beamforming, hybrid beamforming, nonconvex optimization algorithms, regularized zero-forcing beamforming
Identifiers
Local EPrints ID: 437018
URI: http://eprints.soton.ac.uk/id/eprint/437018
ISSN: 0018-9545
PURE UUID: befd6053-b5ef-4716-8f0f-03918523f3c6
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Date deposited: 15 Jan 2020 17:31
Last modified: 18 Mar 2024 02:36
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Author:
A.A. Nasir
Author:
H.D. Tuan
Author:
T.Q. Duong
Author:
H. Vincent Poor
Author:
Lajos Hanzo
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