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Self-interference cancellation and channel estimation in multicarrier-division duplex systems with hybrid beamforming

Self-interference cancellation and channel estimation in multicarrier-division duplex systems with hybrid beamforming
Self-interference cancellation and channel estimation in multicarrier-division duplex systems with hybrid beamforming
Design of full-duplex (FD) wireless systems faces many challenges, including self-interference cancellation (SIC), capability to provide high capacity, high flexibility for operation, best usage of resources, etc. In this paper, we propose and investigate a multicarrier-division duplex (MDD) based hybrid beamforming system operated in FD mode, which is endowed with the advantages of both time-division duplex and frequency-division duplex. It also shares some merits of FD and allows to be free of self-interference (SI) in digital domain, but faces the same challenge of SI as the FD in analog domain. Hence in this paper, we first propose an adaptive beamforming assisted SI cancellation scheme with taking into account the practical requirement of analog-to-digital conversion (ADC). It can be shown that the proposed approach is capable of jointly coping with the desired signals’ transmission and SI suppression. Then, channel estimation (CEst) in MDD/MU-MIMO system is proposed by exploiting the reciprocity between the uplink and downlink subcarrier channels that is provided by MDD. Correspondingly, the orthogonality-achieving pilot symbols are designed, and the least-square (LS) CEst as well as linear minimum mean-square error (LMMSE) CEst are derived. Finally, the performance of MDD/MU-MIMO systems employing the proposed SIC method is investigated, with respect to the SI cancellation capability, sum-rate potential, CEst performance, and the effect of CEst on the achievable performance. Our studies show that MDD/MU-MIMO provides an effective option for design of future wireless transceivers.
Full-duplex, channel estimation, hybrid beamforming, least square, linear minimum mean square error, multicarrier-division duplex, self-interference cancellation
2169-3536
160653-160669
Li, Bohan
79b7a5a4-0966-4611-805b-621d4ff9abb5
Yang, Lieliang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Sun, Songlin
c15a4bac-3d96-49ee-aa22-4e9a0e9393d1
Li, Bohan
79b7a5a4-0966-4611-805b-621d4ff9abb5
Yang, Lieliang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Sun, Songlin
c15a4bac-3d96-49ee-aa22-4e9a0e9393d1

Li, Bohan, Yang, Lieliang, Maunder, Robert and Sun, Songlin (2020) Self-interference cancellation and channel estimation in multicarrier-division duplex systems with hybrid beamforming. IEEE Access, 8, 160653-160669, [9184063]. (doi:10.1109/ACCESS.2020.3020910). (In Press)

Record type: Article

Abstract

Design of full-duplex (FD) wireless systems faces many challenges, including self-interference cancellation (SIC), capability to provide high capacity, high flexibility for operation, best usage of resources, etc. In this paper, we propose and investigate a multicarrier-division duplex (MDD) based hybrid beamforming system operated in FD mode, which is endowed with the advantages of both time-division duplex and frequency-division duplex. It also shares some merits of FD and allows to be free of self-interference (SI) in digital domain, but faces the same challenge of SI as the FD in analog domain. Hence in this paper, we first propose an adaptive beamforming assisted SI cancellation scheme with taking into account the practical requirement of analog-to-digital conversion (ADC). It can be shown that the proposed approach is capable of jointly coping with the desired signals’ transmission and SI suppression. Then, channel estimation (CEst) in MDD/MU-MIMO system is proposed by exploiting the reciprocity between the uplink and downlink subcarrier channels that is provided by MDD. Correspondingly, the orthogonality-achieving pilot symbols are designed, and the least-square (LS) CEst as well as linear minimum mean-square error (LMMSE) CEst are derived. Finally, the performance of MDD/MU-MIMO systems employing the proposed SIC method is investigated, with respect to the SI cancellation capability, sum-rate potential, CEst performance, and the effect of CEst on the achievable performance. Our studies show that MDD/MU-MIMO provides an effective option for design of future wireless transceivers.

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Accepted/In Press date: 28 August 2020
Keywords: Full-duplex, channel estimation, hybrid beamforming, least square, linear minimum mean square error, multicarrier-division duplex, self-interference cancellation

Identifiers

Local EPrints ID: 443718
URI: http://eprints.soton.ac.uk/id/eprint/443718
ISSN: 2169-3536
PURE UUID: 3b74c3b9-e1cc-40a9-8857-63b568ba58e9
ORCID for Bohan Li: ORCID iD orcid.org/0000-0001-7686-8605
ORCID for Lieliang Yang: ORCID iD orcid.org/0000-0002-2032-9327
ORCID for Robert Maunder: ORCID iD orcid.org/0000-0002-7944-2615

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Date deposited: 09 Sep 2020 16:34
Last modified: 15 Sep 2021 02:20

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Contributors

Author: Bohan Li ORCID iD
Author: Lieliang Yang ORCID iD
Author: Robert Maunder ORCID iD
Author: Songlin Sun

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