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Lattice-based mmWave hybrid beamforming

Lattice-based mmWave hybrid beamforming
Lattice-based mmWave hybrid beamforming
Conventional hybrid precoding and combining based transceivers require a large number of high-resolution radio frequency (RF) phase shifters (PSs), which impose prohibitive hardware costs and power consumption. To address the above issue, both partially connected RF PSs and low-resolution PSs have
been proposed. However, the performance limits of these low-cost designs have not been investigated theoretically. Furthermore, there is room for improvement in their spectral efficiency. To fill this knowledge gap, we derive the mean square error performance discrepancy between an optimal precoder/combiner and
the hybrid analog-digital precoder/combiner under the constraint of 1-bit PSs relying on lattice theory. Then, by observing that this performance gap can be reduced by deactivating parts of the PSs whilst improving both the spectral and energy efficiency, we develop an adaptive RF PS connection network. To resolve the associated hybrid precoding and combining problems, we appropriately adapt Babai’s algorithm from the lattice decoding literature. Our simulation results demonstrate the superiority of the proposed scheme both in terms of its spectral and energy efficiency.
0090-6778
Lyu, Shanxiang
b5cfc95d-1db3-4670-a64d-27eb94401e60
Wang, Zheng
59243dae-4f7d-4700-ab68-db57253ae4ed
Gao, Zhen
c2c956b6-60ea-4d9c-b05f-7ccef9c774ec
He, Hongliang
f3531d89-a57e-4661-a11e-649cd077d6de
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Lyu, Shanxiang
b5cfc95d-1db3-4670-a64d-27eb94401e60
Wang, Zheng
59243dae-4f7d-4700-ab68-db57253ae4ed
Gao, Zhen
c2c956b6-60ea-4d9c-b05f-7ccef9c774ec
He, Hongliang
f3531d89-a57e-4661-a11e-649cd077d6de
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Lyu, Shanxiang, Wang, Zheng, Gao, Zhen, He, Hongliang and Hanzo, Lajos (2021) Lattice-based mmWave hybrid beamforming. IEEE Transactions on Communications. (doi:10.1109/TCOMM.2021.3075248).

Record type: Article

Abstract

Conventional hybrid precoding and combining based transceivers require a large number of high-resolution radio frequency (RF) phase shifters (PSs), which impose prohibitive hardware costs and power consumption. To address the above issue, both partially connected RF PSs and low-resolution PSs have
been proposed. However, the performance limits of these low-cost designs have not been investigated theoretically. Furthermore, there is room for improvement in their spectral efficiency. To fill this knowledge gap, we derive the mean square error performance discrepancy between an optimal precoder/combiner and
the hybrid analog-digital precoder/combiner under the constraint of 1-bit PSs relying on lattice theory. Then, by observing that this performance gap can be reduced by deactivating parts of the PSs whilst improving both the spectral and energy efficiency, we develop an adaptive RF PS connection network. To resolve the associated hybrid precoding and combining problems, we appropriately adapt Babai’s algorithm from the lattice decoding literature. Our simulation results demonstrate the superiority of the proposed scheme both in terms of its spectral and energy efficiency.

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Lattice-Based mmWave Hybrid Beamforming - Accepted Manuscript
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Accepted/In Press date: 19 April 2021
e-pub ahead of print date: 23 April 2021

Identifiers

Local EPrints ID: 448737
URI: http://eprints.soton.ac.uk/id/eprint/448737
ISSN: 0090-6778
PURE UUID: 0956bad1-2e5d-458c-8135-f032a0617087
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 04 May 2021 16:38
Last modified: 05 May 2021 01:34

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Contributors

Author: Shanxiang Lyu
Author: Zheng Wang
Author: Zhen Gao
Author: Hongliang He
Author: Lajos Hanzo ORCID iD

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