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Modulated Coded OFDM Systems with Special Precoder

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Abstract

Orthogonal frequency-division multiplexing (OFDM) has been considered as a strong candidate for next-generation wireless communication systems to achieve high rate data transmission in a mobile environment. However, the performance of OFDM systems may be degraded when inter-symbol interference (ISI) channels have spectral nulls, and the data rate overhead due to the insertion of cyclic prefix is high when ISI channels have many taps. Recently, the precoded OFDM systems and vector OFDM (VOFDM) systems were proposed to combat these two problems, respectively. We propose a novel modulated coded OFDM system with special precoder that is robust to spectral nulls and with reduced cyclic prefix length. The precoder can be easily formulated by channel coding and digital modulation. This precoding scheme uses the redundancy information introduced by channel coding (such as zeros inserted in precoded OFDM system). It is able to remove the spectral nulls of an ISI channel without knowing the ISI. Simulation results show that our proposed OFDM system performance is better than precoded OFDM and VOFDM system.

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Authors and Affiliations

  1. The Communication Research Center, Harbin Institute of Technology, 150001, Harbin, People’s Republic of China

    Xin-Lin Huang & Gang Wang

  2. Department of Electrical and Computer Engineering, The University of Alabama, Tuscaloosa, AL, 35487, USA

    Fei Hu

Authors
  1. Xin-Lin Huang
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  2. Gang Wang
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  3. Fei Hu
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Corresponding author

Correspondence to Xin-Lin Huang.

Additional information

This work was supported by China Ministry of Science and Technology under Grant No. 2007CB310601.

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Huang, XL., Wang, G. & Hu, F. Modulated Coded OFDM Systems with Special Precoder. Wireless Pers Commun 60, 635–648 (2011). https://doi.org/10.1007/s11277-010-9964-0

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  • DOI: https://doi.org/10.1007/s11277-010-9964-0

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