Barankin bounds for source localization in an uncertain ocean environment

Joseph Tabrikian, Jeffrey L. Krolik

Research output: Contribution to journalArticlepeer-review

68 Scopus citations


Ambiguity surfaces for underwater acoustic matched-field processing are prone to having high secondary peaks. This leads to anomalous source localization estimates below a threshold signal-to-noise ratio (SNR) at which the performance rapidly departs from that predicted by the Cramer-Rao lower bound (CRLB). In this paper, Barankin bounds are used to predict the threshold SNR under two different models including known or uncertain shallow-water environments and monochromatic or random narrowband sources. Evaluation of the Barankin bound suggests that although asymptotic localization performance degrades with increasing environmental uncertainty, the threshold SNR is relatively unaffected.

Original languageEnglish
Pages (from-to)2917-2927
Number of pages11
JournalIEEE Transactions on Signal Processing
Issue number11
StatePublished - 1 Dec 1999


  • Barankin bound
  • Shallow water
  • Source localization
  • Threshold SNR

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering


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