Spatial Degrees of Freedom Exploration and Analog Beamforming Designs for Signature Spatial Modulation

Yuwen CAO; Tomoaki OHTSUKI

doi:10.1587/transcom.2020EBT0010

Spatial Degrees of Freedom Exploration and Analog Beamforming Designs for Signature Spatial Modulation

Yuwen CAO, Tomoaki OHTSUKI

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In this paper, we focus on developing efficient multi-configuration selection mechanisms by exploiting the spatial degrees of freedom (DoF), and leveraging the simple design benefits of spatial modulation (SM). Notably, the SM technique, as well as its variants, faces the following critical challenges: (i) the performance degradation and difficulty in improving the system performance for higher-level QAM constellations, and (ii) the vast complexity cost in precoder designs particularly for the increasing system dimension and amplitude-phase modulation (APM) constellation dimension. Given this situation, we first investigate two independent modulation domains, i.e., the original signal- and spatial-constellations. By exploiting the analog shift weighting and the virtual spatial signature technologies, we introduce the signature spatial modulation (SSM) concept, which is capable of guaranteing superior trade-offs among spectral- and cost-efficiencies, and system bit error rate (BER) performance. Besides, we develop an analog beamforming for SSM by solving the introduced unconstrained Lagrange dual function minimization problem. Numerical results manifest the performance gain brought by our developed analog beamforming for SSM.

Publication: IEICE TRANSACTIONS on Communications Vol.E104-B No.8 pp.934-941

Publication Date: 2021/08/01

Publicized: 2021/02/24

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2020EBT0010

Type of Manuscript: PAPER

Category: Fundamental Theories for Communications

Authors

Yuwen CAO
Keio University
Tomoaki OHTSUKI
Keio University

Keyword

spatial degrees of freedom (DoF), signal- and spatial-constellations, analog shift weighting, signature spatial modulation (SSM), analog beamforming

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Yuwen CAO, Tomoaki OHTSUKI, "Spatial Degrees of Freedom Exploration and Analog Beamforming Designs for Signature Spatial Modulation" in IEICE TRANSACTIONS on Communications, vol. E104-B, no. 8, pp. 934-941, August 2021, doi: 10.1587/transcom.2020EBT0010.
Abstract: In this paper, we focus on developing efficient multi-configuration selection mechanisms by exploiting the spatial degrees of freedom (DoF), and leveraging the simple design benefits of spatial modulation (SM). Notably, the SM technique, as well as its variants, faces the following critical challenges: (i) the performance degradation and difficulty in improving the system performance for higher-level QAM constellations, and (ii) the vast complexity cost in precoder designs particularly for the increasing system dimension and amplitude-phase modulation (APM) constellation dimension. Given this situation, we first investigate two independent modulation domains, i.e., the original signal- and spatial-constellations. By exploiting the analog shift weighting and the virtual spatial signature technologies, we introduce the signature spatial modulation (SSM) concept, which is capable of guaranteing superior trade-offs among spectral- and cost-efficiencies, and system bit error rate (BER) performance. Besides, we develop an analog beamforming for SSM by solving the introduced unconstrained Lagrange dual function minimization problem. Numerical results manifest the performance gain brought by our developed analog beamforming for SSM.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2020EBT0010/_p

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@ARTICLE{e104-b_8_934,
author={Yuwen CAO, Tomoaki OHTSUKI, },
journal={IEICE TRANSACTIONS on Communications},
title={Spatial Degrees of Freedom Exploration and Analog Beamforming Designs for Signature Spatial Modulation},
year={2021},
volume={E104-B},
number={8},
pages={934-941},
abstract={In this paper, we focus on developing efficient multi-configuration selection mechanisms by exploiting the spatial degrees of freedom (DoF), and leveraging the simple design benefits of spatial modulation (SM). Notably, the SM technique, as well as its variants, faces the following critical challenges: (i) the performance degradation and difficulty in improving the system performance for higher-level QAM constellations, and (ii) the vast complexity cost in precoder designs particularly for the increasing system dimension and amplitude-phase modulation (APM) constellation dimension. Given this situation, we first investigate two independent modulation domains, i.e., the original signal- and spatial-constellations. By exploiting the analog shift weighting and the virtual spatial signature technologies, we introduce the signature spatial modulation (SSM) concept, which is capable of guaranteing superior trade-offs among spectral- and cost-efficiencies, and system bit error rate (BER) performance. Besides, we develop an analog beamforming for SSM by solving the introduced unconstrained Lagrange dual function minimization problem. Numerical results manifest the performance gain brought by our developed analog beamforming for SSM.},
keywords={},
doi={10.1587/transcom.2020EBT0010},
ISSN={1745-1345},
month={August},}

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TY - JOUR
TI - Spatial Degrees of Freedom Exploration and Analog Beamforming Designs for Signature Spatial Modulation
T2 - IEICE TRANSACTIONS on Communications
SP - 934
EP - 941
AU - Yuwen CAO
AU - Tomoaki OHTSUKI
PY - 2021
DO - 10.1587/transcom.2020EBT0010
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E104-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2021
AB - In this paper, we focus on developing efficient multi-configuration selection mechanisms by exploiting the spatial degrees of freedom (DoF), and leveraging the simple design benefits of spatial modulation (SM). Notably, the SM technique, as well as its variants, faces the following critical challenges: (i) the performance degradation and difficulty in improving the system performance for higher-level QAM constellations, and (ii) the vast complexity cost in precoder designs particularly for the increasing system dimension and amplitude-phase modulation (APM) constellation dimension. Given this situation, we first investigate two independent modulation domains, i.e., the original signal- and spatial-constellations. By exploiting the analog shift weighting and the virtual spatial signature technologies, we introduce the signature spatial modulation (SSM) concept, which is capable of guaranteing superior trade-offs among spectral- and cost-efficiencies, and system bit error rate (BER) performance. Besides, we develop an analog beamforming for SSM by solving the introduced unconstrained Lagrange dual function minimization problem. Numerical results manifest the performance gain brought by our developed analog beamforming for SSM.
ER -