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A Cyclic Prefix Free Multiple Input Multiple Output Generalized Frequency Division Multiplexing System Design

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Abstract

The existing generalized frequency division multiplexing (GFDM) systems employ cyclic prefix (CP) to avoid inter-symbol interference (ISI) in frequency-selective fading channels. For multiple input multiple output GFDM (MIMO-GFDM) system, the existence of CP will result in the losses of spectrum efficiency, energy efficiency and transmission rate (SET). In this paper, we propose a novel MIMO-GFDM system without CP insertion. We design a decision feedback equalizer that is performed before fast Fourier transform operation to efficiently remove ISI. We also design a CP restoration unit to remove the inter-carrier interference in the MIMO-GFDM systems. The proposed CP-free MIMO-GFDM system offers a much higher SET than traditional MIMO-GFDM systems in frequency selective fading channels. Some simulation examples are given to demonstrate the effective of the proposed MIMO-GFDM system.

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Authors and Affiliations

  1. Department of Electrical Engineering, National Chung-Hsing University, Taichung, Taiwan

    Yeh Chuang & Fang-Biau Ueng

  2. Department of Aeronautical Engineering, National Formosa University, Yunlin, Taiwan

    Ye-Shun Shen

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  1. Yeh Chuang
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  2. Fang-Biau Ueng
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Correspondence to Fang-Biau Ueng.

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Chuang, Y., Ueng, FB. & Shen, YS. A Cyclic Prefix Free Multiple Input Multiple Output Generalized Frequency Division Multiplexing System Design. Wireless Pers Commun 117, 311–336 (2021). https://doi.org/10.1007/s11277-020-07870-6

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