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Wireless Personal Communications

, Volume 97, Issue 3, pp 3979–3992 | Cite as

Parameter Blind Estimation of Frequency-Hopping Signal Based on Time–Frequency Diagram Modification

  • Weihong FuEmail author
  • Xiaohui Li
  • Naian Liu
  • Yongqiang Hei
  • Juan Wei
Article
  • 198 Downloads

Abstract

To effectively estimate the parameters of the multiple frequency-hopping signals, a blind parameter estimation method based on time–frequency diagram modification is proposed. Firstly, the observed signal is transformed to the time–frequency domain, using short time Fourier transform with overlapping windows. Then an energy detection method based on adaptive threshold is used to modify the time–frequency diagram, and the parameters of the frequency-hopping signals are finally obtained from the modified spectrogram. Theoretical analysis and simulation results show that the method proposed can get a clear time–frequency diagram at low signal-to-noise ratio (SNR), and its accuracy of parameter estimated is higher than that of previous methods. When SNR is −10 dB, estimation errors of frequency, hopping time and hop duration is 0.0002, 0.0008 and 0.0013, respectively, which are about 1–2 orders of magnitude lower over the previous method.

Keywords

Wireless communication Frequency-hopping (FH) Underdetermined blind source separation (UBSS) Time–frequency diagram modification Parameter blind estimation 

Notes

Acknowledgements

This work was supported by National Nature Science Foundation of China (61201134); China Scholarship Council (201308610053), and the 111 Project (B08038).

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  • Weihong Fu
    • 1
    Email author
  • Xiaohui Li
    • 1
  • Naian Liu
    • 1
  • Yongqiang Hei
    • 1
  • Juan Wei
    • 1
  1. 1.School of Telecommunications EngineeringXidian UniversityXi’anPeople’s Republic of China

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