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ML integer frequency offset estimation for OFDM systems with null subcarriers: Estimation range and pilot design

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Abstract

In this paper the estimation range (ERG) of any null subcarriers (NSC) placement is further investigated and sufficient and necessary conditions of an NSC allocation that achieves a full ERG are defined. Then, a perfect distributed NSC allocation with the NSC distance larger than coherent bandwidth is devised to fully exploit frequency diversity of wireless channels and achieve a full ERG. Simulations confirmed that the propsoed FFT-based ML method of using this NSC placement has a smaller bandwidth overhead, achieves a fuller ERG and provides a better performance than the existing methods of using the consecutive NSC allocation at middle and high signal-to-noise ratios (SNRs).

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Authors and Affiliations

  1. School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China

    Feng Shu, QinChuan Zhang & Mao Wang

  2. National Moible Communication Research Lab, Southeast University, Nanjing, 210096, China

    Feng Shu & DongMing Wang

  3. Department of Electrical Engineering, University of Texas at Dallas, Texas, 75080, USA

    Feng Shu

  4. Department of Electrical Engineering and Computer Engineering, the University of Auckland, Auckland, 1142, New Zealand

    Stevan Berber

Authors
  1. Feng Shu
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  2. Stevan Berber
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  3. DongMing Wang
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  4. QinChuan Zhang
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  5. Mao Wang
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Correspondence to Feng Shu.

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Shu, F., Berber, S., Wang, D. et al. ML integer frequency offset estimation for OFDM systems with null subcarriers: Estimation range and pilot design. Sci. China Inf. Sci. 53, 2567–2575 (2010). https://doi.org/10.1007/s11432-010-4125-3

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  • DOI: https://doi.org/10.1007/s11432-010-4125-3

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