A novel sparse array geometry embedding two sizes of spatial invariances is presented for use with a new ESPRIT-based (estimation of signal parameters via rotational invariance techniques) algorithm for aperture extension. The half-wavelength invariance yields unambiguous but high-variance direction cosine estimates to disambiguate low-variance but cyclically ambiguous estimates from the larger invariance. With larger invariance at 60 half-wavelengths, resolution threshold for two closely spaced emitters is reduced by 50 dB and estimation error by 100-fold. Array design formulas are also presented.


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    Titel :

    Direction-finding with sparse rectangular dual-size spatial invariance array


    Beteiligte:
    Wong, K.T. (Autor:in) / Zoltowski, M.D. (Autor:in)


    Erscheinungsdatum :

    01.10.1998


    Format / Umfang :

    1662843 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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