Equalization of OSDM over time-varying channels based on diagonal-block-banded matrix enhancement

Jing Han; Yujie Wang; Zehui Gong; Geert Leus

doi:10.1016/j.sigpro.2019.107333

Equalization of OSDM over time-varying channels based on diagonal-block-banded matrix enhancement

Jing Han^*, Yujie Wang, Zehui Gong, Geert Leus

^*Corresponding author for this work

Signal Processing Systems

Research output: Contribution to journal › Article › Scientific › peer-review

1 Citation (Scopus)

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Abstract

Orthogonal signal-division multiplexing (OSDM) has recently emerged as a promising alternative to orthogonal frequency division multiplexing (OFDM) for high-rate wireless communications. Although providing more flexibility in system design, it suffers from a special interference structure, namely inter-vector interference (IVI), when channel time variations are present. In this paper, we first derive the general OSDM signal model over time-varying channels, and then show that a time-domain window can be used to enhance the diagonal-block-banded (DBB) approximation of the channel matrix in a transformed domain. Furthermore, based on the DBB matrix enhancement, a low-complexity OSDM equalization algorithm is designed. Simulation results indicate that the proposed equalizer has significant performance advantages over that using the direct DBB approximation.

Original language	English
Article number	107333
Pages (from-to)	1-6
Number of pages	6
Journal	Signal Processing
Volume	168
DOIs	https://doi.org/10.1016/j.sigpro.2019.107333
Publication status	Published - 2020

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care

Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Equalization
Inter-vector interference
OSDM
Time-varying channel
Underwater acoustic communication

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10.1016/j.sigpro.2019.107333

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@article{b01af06772344d40ab81c091df49eda1,

title = "Equalization of OSDM over time-varying channels based on diagonal-block-banded matrix enhancement",

abstract = "Orthogonal signal-division multiplexing (OSDM) has recently emerged as a promising alternative to orthogonal frequency division multiplexing (OFDM) for high-rate wireless communications. Although providing more flexibility in system design, it suffers from a special interference structure, namely inter-vector interference (IVI), when channel time variations are present. In this paper, we first derive the general OSDM signal model over time-varying channels, and then show that a time-domain window can be used to enhance the diagonal-block-banded (DBB) approximation of the channel matrix in a transformed domain. Furthermore, based on the DBB matrix enhancement, a low-complexity OSDM equalization algorithm is designed. Simulation results indicate that the proposed equalizer has significant performance advantages over that using the direct DBB approximation.",

keywords = "Equalization, Inter-vector interference, OSDM, Time-varying channel, Underwater acoustic communication",

author = "Jing Han and Yujie Wang and Zehui Gong and Geert Leus",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",

year = "2020",

doi = "10.1016/j.sigpro.2019.107333",

language = "English",

volume = "168",

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AU - Han, Jing

AU - Wang, Yujie

AU - Gong, Zehui

AU - Leus, Geert

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2020

Y1 - 2020

N2 - Orthogonal signal-division multiplexing (OSDM) has recently emerged as a promising alternative to orthogonal frequency division multiplexing (OFDM) for high-rate wireless communications. Although providing more flexibility in system design, it suffers from a special interference structure, namely inter-vector interference (IVI), when channel time variations are present. In this paper, we first derive the general OSDM signal model over time-varying channels, and then show that a time-domain window can be used to enhance the diagonal-block-banded (DBB) approximation of the channel matrix in a transformed domain. Furthermore, based on the DBB matrix enhancement, a low-complexity OSDM equalization algorithm is designed. Simulation results indicate that the proposed equalizer has significant performance advantages over that using the direct DBB approximation.

AB - Orthogonal signal-division multiplexing (OSDM) has recently emerged as a promising alternative to orthogonal frequency division multiplexing (OFDM) for high-rate wireless communications. Although providing more flexibility in system design, it suffers from a special interference structure, namely inter-vector interference (IVI), when channel time variations are present. In this paper, we first derive the general OSDM signal model over time-varying channels, and then show that a time-domain window can be used to enhance the diagonal-block-banded (DBB) approximation of the channel matrix in a transformed domain. Furthermore, based on the DBB matrix enhancement, a low-complexity OSDM equalization algorithm is designed. Simulation results indicate that the proposed equalizer has significant performance advantages over that using the direct DBB approximation.

KW - Equalization

KW - Inter-vector interference

KW - OSDM

KW - Time-varying channel

KW - Underwater acoustic communication

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DO - 10.1016/j.sigpro.2019.107333

M3 - Article

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SN - 0165-1684

VL - 168

SP - 1

EP - 6

JO - Signal Processing

JF - Signal Processing

M1 - 107333

ER -

Equalization of OSDM over time-varying channels based on diagonal-block-banded matrix enhancement

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Keywords

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