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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
Published in:
Aerospace and Electronic Systems, IEEE Transactions on
(Volume:34
,
Issue:
4
)
Date of Publication: Oct 1998
- Page(s):
- 1320 - 1336
- ISSN :
- 0018-9251
- INSPEC Accession Number:
- 6072689
- Digital Object Identifier :
- 10.1109/7.722717
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Oct 1998
- Sponsored by :
- Aerospace & Electronic Systems Society
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