Wideband Generalized Beamspace Modulation (wGBM) for mmWave Massive MIMO over Doubly-Selective Channels

Yajun Fan; Shijian Gao; Xiang Cheng; Liuqing Yang; Ning Wang

doi:10.1109/tvt.2021.3085575

Wideband Generalized Beamspace Modulation (wGBM) for mmWave Massive MIMO over Doubly-Selective Channels

Yajun Fan, Shijian Gao, Xiang Cheng, Liuqing Yang, Ning Wang

Electrical and Computer Engineering

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

11 Scopus citations

Abstract

Generalized beam modulation (GBM) is a recently proposed spectrum efficiency (SE)-enhanced index modulation (IM) scheme for narrowband millimeter wave (mmWave) massive multiple-input multiple-output (mMIMO) systems with hybrid transceivers. Unlike most existing fully-digital IM techniques whose application to wideband channels is straightforward after adopting the orthogonal frequency division multiplexing (OFDM) technique, extending GBM from the narrowband to wideband channels is quite challenging. The reason is that the per-subcarrier process in hybrid OFDM systems is no longer independent across individuals as all subcarriers share a common analog beamformer. Hence, the designed wideband GBM (wGBM) has to be compatible with hybrid OFDM systems while maintaining the SE-enhanced merit of GBM. Towards this objective, a symbol-based instead of the prevalent subcarrier-based paradigm is applied to guide wGBM design. To avoid the high detection complexity in large-scale OFDM systems, we devise a low-complexity detector by transforming the complicated symbol (block) detection into the manageable subcarrier (sub-block) detection. Finally, a simple first-order Doppler compensator is carefully designed to enhance the robustness of wGBM against Doppler. Both theoretical analyses and numerical simulations have been carried out to demonstrate the superiority of wGBM over existing alternatives in terms of error performance and energy efficiency.

Original language	English (US)
Article number	9444807
Pages (from-to)	6869-6880
Number of pages	12
Journal	IEEE Transactions on Vehicular Technology
Volume	70
Issue number	7
DOIs	https://doi.org/10.1109/tvt.2021.3085575
State	Published - Jul 1 2021

Bibliographical note

Funding Information:
Manuscript received September 23, 2020; revised April 2, 2021; accepted May 16, 2021. Date of publication June 1, 2021; date of current version July 20, 2021. This work was supported in part by the Ministry National Key Research and Development Project under Grant 2019YFE0196600, and in part by the National Science Foundation under Grants CPS-2103256 and ECCS-2102312. The review of this article was coordinated by Prof. Y. Guan. (Corresponding authors: Xiang Cheng; Ning Wang.) Yajun Fan and Ning Wang are with the School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China (e-mail: [email protected]; [email protected]).

Publisher Copyright:
© 1967-2012 IEEE.

Keywords

Doppler compensator
doubly-selective channels
massive MIMO
mmWave
symbol-based
wideband generalized beamspace modulation

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10.1109/tvt.2021.3085575

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title = "Wideband Generalized Beamspace Modulation (wGBM) for mmWave Massive MIMO over Doubly-Selective Channels",

abstract = "Generalized beam modulation (GBM) is a recently proposed spectrum efficiency (SE)-enhanced index modulation (IM) scheme for narrowband millimeter wave (mmWave) massive multiple-input multiple-output (mMIMO) systems with hybrid transceivers. Unlike most existing fully-digital IM techniques whose application to wideband channels is straightforward after adopting the orthogonal frequency division multiplexing (OFDM) technique, extending GBM from the narrowband to wideband channels is quite challenging. The reason is that the per-subcarrier process in hybrid OFDM systems is no longer independent across individuals as all subcarriers share a common analog beamformer. Hence, the designed wideband GBM (wGBM) has to be compatible with hybrid OFDM systems while maintaining the SE-enhanced merit of GBM. Towards this objective, a symbol-based instead of the prevalent subcarrier-based paradigm is applied to guide wGBM design. To avoid the high detection complexity in large-scale OFDM systems, we devise a low-complexity detector by transforming the complicated symbol (block) detection into the manageable subcarrier (sub-block) detection. Finally, a simple first-order Doppler compensator is carefully designed to enhance the robustness of wGBM against Doppler. Both theoretical analyses and numerical simulations have been carried out to demonstrate the superiority of wGBM over existing alternatives in terms of error performance and energy efficiency.",

keywords = "Doppler compensator, doubly-selective channels, massive MIMO, mmWave, symbol-based, wideband generalized beamspace modulation",

author = "Yajun Fan and Shijian Gao and Xiang Cheng and Liuqing Yang and Ning Wang",

note = "Funding Information: Manuscript received September 23, 2020; revised April 2, 2021; accepted May 16, 2021. Date of publication June 1, 2021; date of current version July 20, 2021. This work was supported in part by the Ministry National Key Research and Development Project under Grant 2019YFE0196600, and in part by the National Science Foundation under Grants CPS-2103256 and ECCS-2102312. The review of this article was coordinated by Prof. Y. Guan. (Corresponding authors: Xiang Cheng; Ning Wang.) Yajun Fan and Ning Wang are with the School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China (e-mail: [email protected]; [email protected]). Publisher Copyright: {\textcopyright} 1967-2012 IEEE.",

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AU - Yang, Liuqing

AU - Wang, Ning

N1 - Funding Information: Manuscript received September 23, 2020; revised April 2, 2021; accepted May 16, 2021. Date of publication June 1, 2021; date of current version July 20, 2021. This work was supported in part by the Ministry National Key Research and Development Project under Grant 2019YFE0196600, and in part by the National Science Foundation under Grants CPS-2103256 and ECCS-2102312. The review of this article was coordinated by Prof. Y. Guan. (Corresponding authors: Xiang Cheng; Ning Wang.) Yajun Fan and Ning Wang are with the School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China (e-mail: [email protected]; [email protected]). Publisher Copyright: © 1967-2012 IEEE.

PY - 2021/7/1

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N2 - Generalized beam modulation (GBM) is a recently proposed spectrum efficiency (SE)-enhanced index modulation (IM) scheme for narrowband millimeter wave (mmWave) massive multiple-input multiple-output (mMIMO) systems with hybrid transceivers. Unlike most existing fully-digital IM techniques whose application to wideband channels is straightforward after adopting the orthogonal frequency division multiplexing (OFDM) technique, extending GBM from the narrowband to wideband channels is quite challenging. The reason is that the per-subcarrier process in hybrid OFDM systems is no longer independent across individuals as all subcarriers share a common analog beamformer. Hence, the designed wideband GBM (wGBM) has to be compatible with hybrid OFDM systems while maintaining the SE-enhanced merit of GBM. Towards this objective, a symbol-based instead of the prevalent subcarrier-based paradigm is applied to guide wGBM design. To avoid the high detection complexity in large-scale OFDM systems, we devise a low-complexity detector by transforming the complicated symbol (block) detection into the manageable subcarrier (sub-block) detection. Finally, a simple first-order Doppler compensator is carefully designed to enhance the robustness of wGBM against Doppler. Both theoretical analyses and numerical simulations have been carried out to demonstrate the superiority of wGBM over existing alternatives in terms of error performance and energy efficiency.

AB - Generalized beam modulation (GBM) is a recently proposed spectrum efficiency (SE)-enhanced index modulation (IM) scheme for narrowband millimeter wave (mmWave) massive multiple-input multiple-output (mMIMO) systems with hybrid transceivers. Unlike most existing fully-digital IM techniques whose application to wideband channels is straightforward after adopting the orthogonal frequency division multiplexing (OFDM) technique, extending GBM from the narrowband to wideband channels is quite challenging. The reason is that the per-subcarrier process in hybrid OFDM systems is no longer independent across individuals as all subcarriers share a common analog beamformer. Hence, the designed wideband GBM (wGBM) has to be compatible with hybrid OFDM systems while maintaining the SE-enhanced merit of GBM. Towards this objective, a symbol-based instead of the prevalent subcarrier-based paradigm is applied to guide wGBM design. To avoid the high detection complexity in large-scale OFDM systems, we devise a low-complexity detector by transforming the complicated symbol (block) detection into the manageable subcarrier (sub-block) detection. Finally, a simple first-order Doppler compensator is carefully designed to enhance the robustness of wGBM against Doppler. Both theoretical analyses and numerical simulations have been carried out to demonstrate the superiority of wGBM over existing alternatives in terms of error performance and energy efficiency.

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KW - symbol-based

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Wideband Generalized Beamspace Modulation (wGBM) for mmWave Massive MIMO over Doubly-Selective Channels

Abstract

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