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On the resolution probability of MUSIC in presence of modelling errors

Ferreol, A. (author)
Laboratoire des Systemes et Applications des Technologies de l'Information et de l'Energie,Thales Group
Larzabal, P. (author)
Laboratoire des Systemes et Applications des Technologies de l'Information et de l'Energie
Viberg, Mats, 1961 (author)
Chalmers tekniska högskola,Chalmers University of Technology
 (creator_code:org_t)
2008
2008
English.
In: IEEE Transactions on Signal Processing. - 1941-0476 .- 1053-587X. ; 56:5, s. 1945-1953
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The problem of resolving closely spaced signal sources using an antenna array remains a difficult one, although several estimation methods are available in the literature. When the array correlation matrix is known, the resolution capability of subspace algorithms is infinitely high. However, in the presence of modeling errors the resolution deteriorates, even for a known correlation matrix. In this paper, we analyze the MUSIC method, by way of three different definitions of the resolution. Assuming Gaussian circular random modeling errors, we determine the corresponding expressions of the probability of source resolution versus the model mismatch. A first series of simulations validates the mathematical expression of the three resolution probabilities. A second series of simulations is used to select among them the tightest one to the empirical one. The results are useful, e.g., for determining the necessary antenna calibration accuracy to achieve a target performance. © 2008 IEEE.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Keyword

Modeling errors
Performances
DOA estimation

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art (subject category)
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