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Partially-activated conjugate beamforming for LoS massive MIMO communications

Partially-activated conjugate beamforming for LoS massive MIMO communications
Partially-activated conjugate beamforming for LoS massive MIMO communications

A partially-activated conjugate beamforming (PACB) is proposed for massive multiple-input multiple-output (MIMO) communications where the line-of-sight (LoS) channel is dominant. Unlike the conventional conjugate beamforming which activates all the antenna elements to radiate the signals, our PACB activates only a fraction of the antennas by exploiting the spatial structure of LoS channel, and it can mitigate the inter-user interference more effectively, leading to dramatically enhanced downlink spectral efficiency. A low-complexity search algorithm is also introduced to calculate the optimal number of activated antennas. Theoretical analysis and simulation results both confirm that our PACB offers significantly higher downlink spectral efficiency compared to its conventional beamforming counterpart.

inter-user interference, lineof- sight, massive MIMO, Partially-activated conjugate beamforming
2169-3536
1-9
Liu, Wendong
4ddec520-1100-4ac2-acc6-0b82144f6f2c
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Cao, Jianfei
11bef1b9-86e5-49ff-ab8a-6ae95a6a5a2e
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Liu, Wendong
4ddec520-1100-4ac2-acc6-0b82144f6f2c
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Cao, Jianfei
11bef1b9-86e5-49ff-ab8a-6ae95a6a5a2e
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Liu, Wendong, Wang, Zhaocheng, Cao, Jianfei, Chen, Sheng and Hanzo, Lajos (2018) Partially-activated conjugate beamforming for LoS massive MIMO communications. IEEE Access, 1-9. (doi:10.1109/ACCESS.2018.2872953).

Record type: Article

Abstract

A partially-activated conjugate beamforming (PACB) is proposed for massive multiple-input multiple-output (MIMO) communications where the line-of-sight (LoS) channel is dominant. Unlike the conventional conjugate beamforming which activates all the antenna elements to radiate the signals, our PACB activates only a fraction of the antennas by exploiting the spatial structure of LoS channel, and it can mitigate the inter-user interference more effectively, leading to dramatically enhanced downlink spectral efficiency. A low-complexity search algorithm is also introduced to calculate the optimal number of activated antennas. Theoretical analysis and simulation results both confirm that our PACB offers significantly higher downlink spectral efficiency compared to its conventional beamforming counterpart.

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e-pub ahead of print date: 1 October 2018
Keywords: inter-user interference, lineof- sight, massive MIMO, Partially-activated conjugate beamforming

Identifiers

Local EPrints ID: 425388
URI: http://eprints.soton.ac.uk/id/eprint/425388
ISSN: 2169-3536
PURE UUID: b0e9a5da-d82b-4810-92ad-6bec0690da24
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 17 Oct 2018 16:30
Last modified: 20 Jul 2019 01:26

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Contributors

Author: Wendong Liu
Author: Zhaocheng Wang
Author: Jianfei Cao
Author: Sheng Chen
Author: Lajos Hanzo ORCID iD

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