A sidelobes suppression technique for spectra discontinuous HF radar signal

  • Authors:

  • Dongpo Zhang;Xingzhao Liu

  • Affiliations:

  • Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai, China;Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai, China

  • Venue:
  • ICECS'03 Proceedings of the 2nd WSEAS International Conference on Electronics, Control and Signal Processing
  • Year:
  • 2003

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Abstract

Over-the-Horizon High Frequency (OTH-HF) radars operate in HF (High Frequency) band, it is quite difficult to find clear frequency band for radar system requirements in this band due to heavy interferences. To adopt discontinuous spectra waveform can mitigate the interferences influence, as a result it gives rise to high range sidelobes and thus a low signal dynamic range, this kind of sidelobes can not be suppressed by traditional spectral weighting. In this paper we introduce a new signal processing technique based on frequency extrapolation to lower the sidelobes associated with discontinuous spectra signals. Simulation results show significant range sidelobe reduction using this new algorithm.