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Prospects of application of Wigner distribution for unknown radar signals recognition

Keywords:

M.V. Evsikov – Ph.D. (Eng.), Senior Research Scientist, JSC «Concern «VEGA». E-mail: mail@vega.su


The Wigner Distribution is attractive for recognition of unknown radar signals because of its high spectral resolution to instantaneous frequency of LFM signal. The problem of recognition of unknown radar signals may be simplified by detection of triangles in surface of Wigner Distribution. Input signal is recommended to slice in time and compute Wigner Distribution of each slice separately to reduce number of cross terms. The Wigner Distribution is recommended to compute with Short-time Fourier Transform together.
References:

 

  1. Boashash B., Black P. J. An efficient real-time implementation of the Wigner-Ville distribution // IEEE Trans. ASSP. November 1987. V. 35. P. 1611–1618.
  2. Breysuel R. Preobrazovanie Hartli: per s angl. M.: Mir. 1990.
  3. Cohen L. Time-Frequency Distributions – A Review. // Proc. IEEE. July 1989. V. 77. № 7. Perevod na russkijj jazyk: Koehn L. Vremja-chastotnye raspredelenija: Obzor // TIIEHR. 1989. T. 77. № 10.S. 72–120.
  4. Boashash B. (Ed.) Time-Frequency Signal Analysis and Processing: A Comprehensive Reference. Elsevier. Amsterdam. 2003.

 

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