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Novel Blind Recognition Algorithm of Frame Synchronization Words Based on Soft-Decision in Digital Communication Systems

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  • Jiangyi Qin
  • Zhiping Huang
  • Chunwu Liu
  • Shaojing Su
  • Jing Zhou

Abstract

A novel blind recognition algorithm of frame synchronization words is proposed to recognize the frame synchronization words parameters in digital communication systems. In this paper, a blind recognition method of frame synchronization words based on the hard-decision is deduced in detail. And the standards of parameter recognition are given. Comparing with the blind recognition based on the hard-decision, utilizing the soft-decision can improve the accuracy of blind recognition. Therefore, combining with the characteristics of Quadrature Phase Shift Keying (QPSK) signal, an improved blind recognition algorithm based on the soft-decision is proposed. Meanwhile, the improved algorithm can be extended to other signal modulation forms. Then, the complete blind recognition steps of the hard-decision algorithm and the soft-decision algorithm are given in detail. Finally, the simulation results show that both the hard-decision algorithm and the soft-decision algorithm can recognize the parameters of frame synchronization words blindly. What’s more, the improved algorithm can enhance the accuracy of blind recognition obviously.

Suggested Citation

  • Jiangyi Qin & Zhiping Huang & Chunwu Liu & Shaojing Su & Jing Zhou, 2015. "Novel Blind Recognition Algorithm of Frame Synchronization Words Based on Soft-Decision in Digital Communication Systems," PLOS ONE, Public Library of Science, vol. 10(7), pages 1-8, July.
    • Handle: RePEc:plo:pone00:0132114
    DOI: 10.1371/journal.pone.0132114
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