Electromagnetic coupling matrix modeling and ESPRIT-Based direction finding - A case study using a uniform linear array of identical dipoles

Yue Ivan Wu, Gerald Pacaba Arada, Kainam Thomas Wong, Wai Yip Tam

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

4 Citations (Scopus)

Abstract

For the estimation of an incident source's directionof-arrival (DOA) based on data collected from a uniform linear array (ULA) of identical antennas that are electromagnetically coupled mutually, several references have modifications to the well known ESPRIT algorithm, in order to mitigate the mutual coupling effects. These modified ESPRIT-based algorithms discard the data collected by antennas at the two ends of the linear array. Those to-be-overlooked antennas are labeled "auxiliary" antennas or "dummy" antennas. However, those methods presume the antenna-Array's mutual coupling matrix mathematically to be both Toeplitz and banded. These exacting presumptions are tested here by a case study where the antennas are half-wavelength dipoles. This paper discovers that the Toeplitz-And-banded coupling-matrix assumption is actually invalid, based on antenna-electromagnetics computations via the "method of moments". This paper then points out the serious consequences of this Toeplitz-And-banded mis-modeling on the estimation of the incident source's direction-of-Arrival.
Original languageEnglish
Title of host publicationIET Conference Publications
PublisherInstitution of Engineering and Technology
Publication statusPublished - 1 Jan 2015
Event2nd IET International Conference on Intelligent Signal Processing 2015, ISP 2015 - London, United Kingdom
Duration: 1 Dec 20152 Dec 2015

Conference

Conference2nd IET International Conference on Intelligent Signal Processing 2015, ISP 2015
Country/TerritoryUnited Kingdom
CityLondon
Period1/12/152/12/15

Keywords

  • Antenna Array Mutual Coupling
  • Antenna Arrays
  • Array Signal Processing
  • Direction-Of-Arrival Estimation
  • Electromagnetic Coupling
  • Interferometry
  • Mutual Coupling
  • Signal Processing Antennas

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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