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Multiple symbols soft-decision metrics for coded frequency-shift keying signals

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Abstract

This paper derives a novel multiple symbols soft-decision metrics for frequency-shift keying signals which are affected by additive symmetric α-stable (SαS) noise and fading. The approximate metric, which is for the case where channel state information (phases, amplitudes, and noise dispersion parameter) is unknown is obtained based on a generalized-likelihood ratio (GLR) approach. The metric is obtained in closed form and proved to be effective. The performances of the multiple symbols soft-decision metrics are compared numerically for a turbo-coded system. The proposed multiple symbols metric provides substantial improvement over earlier single-symbol metrics.

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Authors and Affiliations

  1. Provincial Key Lab of Information Coding and Transmission, Southwest Jiaotong University, Chengdu, 610031, China

    Zheng Ma & PingZhi Fan

  2. Department of Electrical Engineering, Linköping University, Linköping, SE-581 83, Sweden

    Daniel Persson & Erik G. Larsson

  3. National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China

    Zheng Ma

Authors
  1. Zheng Ma
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  2. Daniel Persson
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  3. Erik G. Larsson
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  4. PingZhi Fan
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Correspondence to Zheng Ma.

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Ma, Z., Persson, D., Larsson, E.G. et al. Multiple symbols soft-decision metrics for coded frequency-shift keying signals. Sci. China Inf. Sci. 56, 1–8 (2013). https://doi.org/10.1007/s11432-012-4768-3

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  • DOI: https://doi.org/10.1007/s11432-012-4768-3

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