A tree structure one-dimensional based algorithm for estimating the two-dimensional direction of arrivals and its performance analysis

Yung Yi Wang*, Liang Cheng Lee, Shih Jen Yang, Jiunn Tsair Chen

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

18 Scopus citations

Abstract

A tree structure algorithm using one-dimensional (1-D) multiple signal classification (MUSIC) algorithm is proposed to estimate the two-dimensional direction of arrivals (2-D DOAs) of coherent signals impinging on a uniform rectangular array. The basic idea of the proposed algorithm is to successively apply several times of the 1-D spatial smoothing MUSIC algorithm, in tree structure, to estimate the azimuth and the elevation angles independently. To optimally separate the receive signal, constrained spatial beamformers with adjustable null width are exploited in conjunction with the 1-D spatial smoothing MUSIC algorithm to decompose the received signal into several signals each lead by its own 2-D DOA. Performance analysis is provided to investigate the estimation bias caused by the residue signal propagating in the tree structure.

Original languageEnglish
Pages (from-to)178-188
Number of pages11
JournalIEEE Transactions on Antennas and Propagation
Volume56
Issue number1
DOIs
StatePublished - 01 2008

Keywords

  • Direction of arrival (DOA) estimation
  • Rectangular antenna array
  • Spatial smoothing

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