Rate allocation for spotlight SAR phase history data compression

James W. Owens, Michael W. Marcellin

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Complex phase history data in synthetic aperture radar (SAR) systems require extensive processing before useful images can be obtained. In spotlight mode SAR systems, useful images can be obtained by applying aperture weighting and inverse Fourier transform operations to SAR phase history data. In this paper, we are concerned with the compression of the complex phase history data obtained by a spotlight SAR system. We exploit knowledge of the aperture weighting function along with Fourier transform processing to attach a "gain" factor to each complex phase history data sample. This gain factor is then used to efficiently allocate bits to the phase history data during quantization. Performance evaluations are presented for this compression system relative to other existing SAR phase history data compression systems.

Original languageEnglish (US)
Pages (from-to)1527-1533
Number of pages7
JournalIEEE Transactions on Image Processing
Volume8
Issue number11
DOIs
StatePublished - Dec 1 1999

Keywords

  • Bit-allocation
  • Compression
  • Radar
  • Rate-allocation
  • SAR

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design

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