Adaptive waveform design for interference mitigation in SAR

Claire Tierney, Bernard Mulgrew

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

This work details an interference mitigation scheme for synthetic aperture radar (SAR) which adapts the transmitted waveform spectrum to restore the quality of the scene range-profile based on the estimated interference spectrum. By expressing the estimation of the range-profile in the presence of correlated noise as a system identification problem, a cost function for the optimal waveform is derived. In order to respond effectively to changes in the radio frequency (RF) environment, adaptive waveform systems should perform waveform design on a small timescale, ideally on a pulse-to-pulse basis. Motivated by the need for a computationally efficient waveform design scheme, an alternative estimator is derived, which yields a closed form solution, which is shown to perform similarly to the optimal case. A series of test SAR images demonstrate the efficacy of this technique and are compared to the standard linearly frequency modulated signal and stretch processing outcome.
Original languageEnglish
Pages (from-to)107759
Number of pages1
JournalSignal Processing
Volume178
Early online date21 Aug 2020
DOIs
Publication statusPublished - 1 Jan 2021

Keywords / Materials (for Non-textual outputs)

  • Waveform design
  • SAR
  • Interference mitigation
  • System identification

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