Cramér-Rao bounds for direction finding by an acoustic vector-sensor under unknown gain / phase uncertainties

Ping Kwan Tam, Kainam Thomas Wong

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)


An acoustic vector-sensor (a.k.a. vector-hydrophone in underwater applications) is composed of two or three spatially collocated but orthogonally oriented acoustic velocity-sensors, plus possibly a collocated acoustic pressure-sensor. An acoustic vector-sensor is versatile for direction-finding, due to its azimuth-elevation spatial response's independence from the incident source's frequency, bandwidth, or radial location (i.e., in the near field as opposed to the far field). Unavailable in the current open literature is how the direction-of-arrival (DOA) estimates may be adversely affected by any unknown non-ideality in the acoustic vector-sensor. The non-ideality may include any unknown deviation from the nominal gain response and/or phase response. This paper pioneers a characterization of these various unknown non-idealities' relative degradation on direction-finding accuracy through Cramér-Rao Bound (CRB) analysis of how the estimation accuracy is degraded relatively by each such unknown non-ideality.
Original languageEnglish
Title of host publicationTENCON 2007 - 2007 IEEE Region 10 Conference
Publication statusPublished - 1 Dec 2007
EventIEEE Region 10 Conference, TENCON 2007 - Taipei, Taiwan
Duration: 30 Oct 20072 Nov 2007


ConferenceIEEE Region 10 Conference, TENCON 2007

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering


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