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

Kainam Thomas Wong; Michael D. Zoltowski

doi:10.1109/7.722717

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

Kainam Thomas Wong, Michael D. Zoltowski

Research output: Journal article publication › Journal article › Academic research › peer-review

77 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1320-1335
Number of pages	16
Journal	IEEE Transactions on Aerospace and Electronic Systems
Volume	34
Issue number	4
DOIs	https://doi.org/10.1109/7.722717
Publication status	Published - 1 Dec 1998
Externally published	Yes

ASJC Scopus subject areas

Aerospace Engineering
Electrical and Electronic Engineering

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10.1109/7.722717

Cite this

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

Abstract

ASJC Scopus subject areas

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