Resolution of a 2pi ambiguity problem in multiple frequencyspectral estimation
An algorithm is proposed to resolve a fundamental 2pi ambiguity problem occurring in multiple frequency spectral estimation. Given M frequencies f(m), and I separate frequency estimators with unambiguous bandwidths F(i), the ambiguity problem can be stated as solving for the fm, given the estimator...
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Veröffentlicht in: | IEEE transactions on aerospace and electronic systems 1995-01, Vol.31 (1), p.2-8 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | An algorithm is proposed to resolve a fundamental 2pi ambiguity problem occurring in multiple frequency spectral estimation. Given M frequencies f(m), and I separate frequency estimators with unambiguous bandwidths F(i), the ambiguity problem can be stated as solving for the fm, given the estimator outputs, alpha(mi), (1 m M;1 i I) where f(m)=alpha(mi) K(mi)F(i) and K(mi) is some integer. The proposed algorithm exhaustively resolves all possible alpha(mi) groupings into single frequency values using a noise insensitive technique that exchanges system bandwidth for noise protection. The correct multiple frequencies are then defined as the single frequencies that repeat a specified number of times. A complete analysis is included |
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ISSN: | 0018-9251 |
DOI: | 10.1109/7.366287 |