High accuracy 2D angle estimation with extended aperture vector sensor arrays

Kainam Thomas Wong, Michael D. Zoltowski

Research output: Journal article publicationConference articleAcademic researchpeer-review

36 Citations (Scopus)

Abstract

A novel ESPRIT-based 2D angle estimation scheme is proposed involving the use of a right-triangular array of three vector sensors spaced much farther apart than a half-wavelength. A vector sensor is composed of six co-located antennas distinctly measuring all six electromagnetic field components of a multi-component incident wavefield. Information on each source's respective electromagnetic field components is obtained by decoupling the signal eigenvectors via lower dimensional eigenvectors derived from TLS-ESPRIT. This facilitates estimation of each source's respective Poynting vector thereby enabling one to resolve the phase ambiguities in ESPRIT's eigenvalues when the inter-vector-sensor spacing is greater than a half-wavelength. Simulations are presented showing the sample variance of the direction cosine estimates decreasing linearly on a log-log scale as the inter-vector-sensor spacing is increased from a half-wavelength to 30 wavelengths, with a factor of 80 reduction in the latter case relative to the former case. The proposed scheme and attendant vector sensor array also outperform a uniformly-spaced array of scalar sensors with the same aperture and same number of component antennas whenever the inter-vector sensor spacing in the former case is greater than 3 half-wavelengths.
Original languageEnglish
Pages (from-to)2789-2792
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume5
Publication statusPublished - 1 Jan 1996
Externally publishedYes
EventProceedings of the 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP. Part 1 (of 6) - Atlanta, GA, United States
Duration: 7 May 199610 May 1996

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Acoustics and Ultrasonics

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