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Data-adaptive array interpolation for DOA estimation in correlated signal environments

Författare:
Publiceringsår: 2005
Språk: Engelska
Sidor: 945-948
Publikation/Tidskrift/Serie: Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing
Dokumenttyp: Konferensbidrag
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.

Sammanfattning

Many popular direction-of-arrival (DOA) estimators rely on the fact that the array response vector of the array is Vandermonde, for example, that of a uniform linear array (ULA). Array interpolation is a preprocessing technique to transform the array response vector of a planar array of arbitrary geometry to that of a ULA over an angular sector. While good approximation within the target sector is attained with the various existing array interpolation approaches, the response of the interpolated array in the out-of-sector region is at best partially controlled. Accordingly, out-of-sector signals, especially those highly correlated with the in-sector signals, can degrade significantly the performance of DOA estimators that rely on the Vandermonde form to work correctly. Recently, we proposed an improved array interpolation approach that takes into account the array response over the full azimuth. In this paper, we develop the idea further and present a simple data-adaptive array interpolation scheme that can provide significantly better accuracy in the DOA estimates. We present examples to demonstrate the effectiveness of our proposal

Nyckelord

  • Electrical Engineering, Electronic Engineering, Information Engineering
  • uniform linear array
  • ULA
  • DOA estimation
  • correlated signal environments
  • data-adaptive array interpolation
  • Vandermonde response vector
  • array response vector
  • direction-of-arrival estimators

Övriga

2005 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
Published
  • ISBN: 0-7803-8874-7

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