Cancellation of doppler distortion in pulse compression for targets moving in an arbitrary direction

Jie Yang, Tapan K. Sarkar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

It can be shown that the hyperbolic frequency modulated waveform is Doppler-invariant only when the Doppler factor is a constant number, i.e., the target has a constant velocity and along the direction from the radar to the target. If the target moves in an arbitrary direction, the degradation of the pulse compression caused by the mismatch between the reflected signal and the matched filter may still exist. In this paper we demonstrate that the Doppler effect caused by the moving target in an arbitrary direction can be approximated by a target with an initial velocity and a constant acceleration along the direction from the radar to the target, which results in a frequency shift in the reflected waveform. Therefore a bank of matched filters with pre-selected values of frequency shifts can be utilized to compensate for the Doppler effect. Numerical examples with target moving in an arbitrary direction are presented to illustrate this effect, which have been successfully compensated by shifting the frequency response of the matched filter.

Original languageEnglish (US)
Title of host publicationIEEE 2007 Radar Conference
Pages297-301
Number of pages5
DOIs
StatePublished - Sep 27 2007
EventIEEE 2007 Radar Conference - Waltham, MA, United States
Duration: Apr 17 2007Apr 20 2007

Publication series

NameIEEE National Radar Conference - Proceedings

Other

OtherIEEE 2007 Radar Conference
CountryUnited States
CityWaltham, MA
Period4/17/074/20/07

Keywords

  • Arbitrary direction
  • Doppler-invariant
  • Pulse compression

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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    Yang, J., & Sarkar, T. K. (2007). Cancellation of doppler distortion in pulse compression for targets moving in an arbitrary direction. In IEEE 2007 Radar Conference (pp. 297-301). [4250325] (IEEE National Radar Conference - Proceedings). https://doi.org/10.1109/RADAR.2007.374231