Relative velocity measurement from the spectral phase of a match-filtered linear frequency modulated pulse

Samuel Pinson, Charles Holland

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Linear frequency modulated signals are commonly used to perform underwater acoustic measurements since they can achieve high signal-to-noise ratios with relatively low source levels. However, such signals present a drawback if the source or receiver or target is moving. The Doppler effect affects signal amplitude, delay, and resolution. To perform a correct match filtering that includes the Doppler shift requires prior knowledge of the relative velocity. In this paper, the relative velocity is extracted directly from the Doppler cross-power spectrum. More precisely, the quadratic coefficient of the Doppler cross-power-spectrum phase is proportional to the relative velocity. The proposed method achieves velocity estimates that compare favorably with Global Positioning System ground truth and the ambiguity method.

Original languageEnglish (US)
Pages (from-to)EL191-EL196
JournalJournal of the Acoustical Society of America
Volume140
Issue number2
DOIs
StatePublished - Aug 1 2016

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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