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Beamspace MIMO-NOMA for millimeter-wave communications using lens antenna arrays

Beamspace MIMO-NOMA for millimeter-wave communications using lens antenna arrays
Beamspace MIMO-NOMA for millimeter-wave communications using lens antenna arrays

The recent concept of beamspace multiple-input multiple-output (MIMO) is capable of significantly reducing the number of radio-frequency (RF) chains required by millimeterwave (mmWave) massive MIMO systems. However, the fundamental limit of the existing beamspace MIMO is that, the number of supported users cannot be higher than the number of RF chains using the same time-frequency resources. To break this limit, beamspace MIMO is integrated with non-orthogonal multiple access (NOMA) in the proposed MIMO-NOMA system in this paper, where the number of supported users can be higher than the number of RF chains. To reduce the interbeam interference, a transmit precoding (TPC) scheme based on the principle of zero-forcing (ZF) is designed. Furthermore, a dynamic power allocation scheme is proposed for maximizing the achievable sum rate. Moreover, a low-complexity iterative optimization algorithm is conceived for dynamic power allocation. Simulation results show that the proposed beamspace MIMONOMA achieves a higher spectrum and energy efficiency than the existing beamspace MIMO for mmWave communications.

1-5
IEEE
Wang, Bichai
d2972e74-aa6b-49b9-95e2-33b772358737
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d
Gao, Xiqi
7bc7fc04-e40a-4054-93d2-d7edcbf05f1f
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Wang, Bichai
d2972e74-aa6b-49b9-95e2-33b772358737
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d
Gao, Xiqi
7bc7fc04-e40a-4054-93d2-d7edcbf05f1f
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Wang, Bichai, Dai, Linglong, Gao, Xiqi and Hanzo, Lajos (2018) Beamspace MIMO-NOMA for millimeter-wave communications using lens antenna arrays. In 2017 IEEE 86th Vehicular Technology Conference, VTC Fall 2017 - Proceedings. vol. 2017-September, IEEE. pp. 1-5 . (doi:10.1109/VTCFall.2017.8288345).

Record type: Conference or Workshop Item (Paper)

Abstract

The recent concept of beamspace multiple-input multiple-output (MIMO) is capable of significantly reducing the number of radio-frequency (RF) chains required by millimeterwave (mmWave) massive MIMO systems. However, the fundamental limit of the existing beamspace MIMO is that, the number of supported users cannot be higher than the number of RF chains using the same time-frequency resources. To break this limit, beamspace MIMO is integrated with non-orthogonal multiple access (NOMA) in the proposed MIMO-NOMA system in this paper, where the number of supported users can be higher than the number of RF chains. To reduce the interbeam interference, a transmit precoding (TPC) scheme based on the principle of zero-forcing (ZF) is designed. Furthermore, a dynamic power allocation scheme is proposed for maximizing the achievable sum rate. Moreover, a low-complexity iterative optimization algorithm is conceived for dynamic power allocation. Simulation results show that the proposed beamspace MIMONOMA achieves a higher spectrum and energy efficiency than the existing beamspace MIMO for mmWave communications.

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More information

Published date: 8 February 2018
Venue - Dates: 86th IEEE Vehicular Technology Conference, VTC Fall 2017, Toronto, Canada, 2017-09-24 - 2017-09-27

Identifiers

Local EPrints ID: 420075
URI: http://eprints.soton.ac.uk/id/eprint/420075
PURE UUID: 01216f74-2e21-43af-bd54-c278fd566580
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 26 Apr 2018 16:30
Last modified: 17 Dec 2019 02:03

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