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A novel differential multiuser detection algorithm for multiuser MIMO-OFDM systems

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Abstract

We propose an efficient low bit error rate (BER) and low complexity multiple-input multiple-output (MIMO) multiuser detection (MUD) method for use with multiuser MIMO orthogonal frequency division multiplexing (OFDM) systems. It is a hybrid method combining a multiuser-interference-cancellation-based decision feedback equalizer using error feedback filter (MIMO MIC DFE-EFF) and a differential algorithm. The proposed method, termed ‘MIMO MIC DFE-EFF with a differential algorithm’ for short, has a multiuser feedback structure. We describe the schemes of MIMO MIC DFE-EFF and MIMO MIC DFE-EFF with a differential algorithm, and compare their minimum mean square error (MMSE) performance and computational complexity. Simulation results show that a significant performance gain can be achieved by employing the MIMO MIC DFE-EFF detection algorithm in the context of a multiuser MIMO-OFDM system over frequency selective Rayleigh channel. MIMO MIC DFE-EFF with the differential algorithm improves both computational efficiency and BER performance in a multistage structure relative to conventional DFE-EFF, though there is a small reduction in system performance compared with MIMO MIC DFE-EFF without the differential algorithm.

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Authors and Affiliations

  1. Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

    Zheng-min Kong, Guang-xi Zhu & Yan-chun Li

  2. Wuhan National Lab for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China

    Zheng-min Kong, Guang-xi Zhu & Yan-chun Li

  3. Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China

    Qiao-ling Tong

Authors
  1. Zheng-min Kong
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  2. Guang-xi Zhu
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  3. Qiao-ling Tong
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  4. Yan-chun Li
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Correspondence to Zheng-min Kong.

Additional information

Project supported by the National Science and Technology Pillar Program (Nos. 2008BAH30B12 and 2008BAH30B09), the Important National Science and Technology Specific Projects (Nos. 2008ZX 03003-004, 2009ZX03003-008, 2009ZX03003-009, and 2009ZX 03002-009), the National Natural Science Foundation of China (No. 60802009), and the National High-Tech R & D Program (863) of China (Nos. 2008AA01Z204 and 2009AA01Z205)

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Kong, Zm., Zhu, Gx., Tong, Ql. et al. A novel differential multiuser detection algorithm for multiuser MIMO-OFDM systems. J. Zhejiang Univ. - Sci. C 11, 798–807 (2010). https://doi.org/10.1631/jzus.C0910735

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  • DOI: https://doi.org/10.1631/jzus.C0910735

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