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Space time processing of signals uses in an airborne early warning radar

Keywords:

V.S. Verba – Dr.Sc.(Eng.), professor, Honored Scientist of the Russian Federation, general director – general designer of JSC «Concern «Vega»
A.A. Trofimov – Ph.D. (Eng.), leading research scientist, JSC «Concern «Vega»
M.I. Chernyushev – Head of laboratory, JSC «Concern «Vega»


The main objective of space time processing of signals in an airborne early warning radar is target signal supporting in influence of ground clutter and active jamming sources environments. When radar is disposed at moving velocity delivery vehicle (plane) ground clutter signals can obtain complex and varied type in a two-dimensional zone “azimuth - doppler frequency”. Radar minor lobe availability provides this, which make clutter return illumination and reception and active jamming sources signals receptionalmost everywhere. In receiver point of guided radar combined echoed signal is a complex sum of signals which are distributed in a two-dimensional zone “azimuth - doppler frequency”. This initiates necessity of processing system, which is agreed upon with signal in “azimuth - doppler frequency” zone. In this paper two-dimensional models of signals of an airborneearly warning pulse Doppler radar and some necessaryfeatures of spatiotemporal processing matched filters are examined. Techniques formation of two-dimensionalfeatures of spatiotemporalfilters includingtechniques of generating narrow minimums of two-dimensional filter characteristic’s modulus for ground clutter signals andactive jamming sources suppression are recommend. Two-dimensional signal processing it is reasonable to promotewith the aid ofcomb discrete filterscollection (“comb” filters) which shows any particular sections at level “azimuth – frequency”. Each severaldiscrete filters represents one frequencychannel which is to say is a discrete space-frequency filter.
References:

  1. Ward J., Kogon S. M. Space-Time Adaptive Processing (STAP) for AMTI and GMTI Radar // MIT Lincoln Laboratory, 26 April 2004.
  2. Melvin W. L. Space-Time Detection Theory. Georgia Tech Research Institute. 7220 Richardson Road, Smyrna, GA 30080, USA.
  3. Shirman Ja.D., Golikov V.N., Busy'gin I.N. Teoreticheskie osnovy' radiolokaczii / pod red. Ja.D. Shirmana. M.: Sov. radio. 1970. 

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