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Low Complexity Detection for Quadrature Spatial Modulation Systems

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Abstract

Quadrature spatial modulation (QSM), where the real and imaginary parts of the transmitted symbol are transmitted separately, was recently proposed to increase the spectral efficiency of spatial modulation. An optimum maximum likelihood (ML) detection was introduced in QSM systems, which leads to high complexity as the exhausting search of all possible transmit antennas. In this paper, a low complexity detection, called signal vector based minimum mean square error (SVMMSE), is proposed for QSM systems. In the proposed SVMMSE detection, we estimate the transmit antenna indices and the transmitted symbol by considering the active transmit antennas in two different scenarios. Simulation results show that the performance of our SVMMSE detection is very close to the ML detection and complexity analysis shows that the computational complexity of the proposed SVMMSE detection is significantly reduced compared with that of the ML detection.

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Acknowledgements

This work was supported by MEST 2015R1A2A1A05000977, NRF, South Korea, Shanghai Rising-Star Program (15QA1400100), National Natural Science Foundation of China (61671143) and the Brain Korea 21 PLUS Project, National Research Foundation of Korea.

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, China

    Jun Li & Yier Yan

  2. School of Information Science and Technology, Donghua University, Shanghai, China

    Xueqin Jiang

  3. Department of Electronics and Information Engineering, Chonbuk National University, Jeonju, South Korea

    Wenjun Yu, Sangseob Song & Moon Ho Lee

Authors
  1. Jun Li
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  2. Xueqin Jiang
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  3. Yier Yan
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  4. Wenjun Yu
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  5. Sangseob Song
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  6. Moon Ho Lee
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Correspondence to Xueqin Jiang.

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Li, J., Jiang, X., Yan, Y. et al. Low Complexity Detection for Quadrature Spatial Modulation Systems. Wireless Pers Commun 95, 4171–4183 (2017). https://doi.org/10.1007/s11277-017-4057-y

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  • DOI: https://doi.org/10.1007/s11277-017-4057-y

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