Enhanced monopulse radar tracking using fractional Fourier filtering in the presence of interference

Sherif A.E.H. Elgamel, J.J. Soraghan

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Monopulse radars are used to track a target that appears in the look direction beam width. Significant distortion is produced when manmade high power interference (jamming) is introduced to the radar processor through the radar antenna main lobe (main lobe interference) or antenna side lobe (side lobe interference). This leads to errors in the target tracking angles that may cause target mistracking. A new monopulse radar structure is presented in this paper which addresses this problem. This structure is based on the use of optimal Fractional Fourier Transform (FrFT) filtering. The improved performance of the new monopulse radar structure over the traditional monopulse processor is assessed using standard deviation angle estimation error (STDAE) for a range of simulated environments. The proposed system configurations with the optimum FrFT filters is shown to reduce the interfered signal and to minimize the STDAE for monopulse processors.
Original languageEnglish
Number of pages3
Publication statusPublished - 16 Jun 2010
Event11th International Radar Symposium IRS-2010 - Vilnius, Lithuania
Duration: 16 Jun 201018 Jun 2010


Conference11th International Radar Symposium IRS-2010
CityVilnius, Lithuania


  • component
  • monopulse radar
  • noise interference
  • fractional fourier filtering


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