SNR Improvement in Semi-active Tracking Radar Using Signal Parameters Estimation

Authors

Abstract

In  continuous  wave  (CW)  radar  systems,  the  efficiency  of  semi-active  chaser  receiver  in  the
tracking  of  target  is  of  paramount  importance.  In  a  situation  where  the  target  and  chaser  have
variable  speed  (accelerated  motion)  relative  to  one  another,  in  the  semi-active  chaser  receiver,
the received signal has time varying Doppler frequency shifts. In this paper, semi-active receiver
with  hierarchical  features  first  acquires  an  estimation  of  the  parameters  of  the  received  signal
using the short time-frequency transform (STFT) at the time of the acceleration of the target or
chaser. Then, mono-pulse angular tracking accuracy is tested using a matched filter based on the  
estimated  parameters  of  the  received  signal.  Eventually,  providing  the  required  simulation,  the
proposed method is compared with “maximum signal spectrum” and “average signal spectrum”
methods.  The  results  imply  that  the  matched  filter-based  algorithm  has  a  better  performance
than other algorithms.

Keywords

References

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Radar
Volume 5, Issue 4 - Serial Number 4
September 2018
Pages 49-60

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History

  • Receive Date: 15 May 2017
  • Revise Date: 26 February 2019
  • Accept Date: 19 September 2018
  • Publish Date: 21 January 2018

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