Passive near-field localization of multiple non-Gaussian sources in 3-D using cumulants
| Autor: | Raghu N. Challa, Sanyogita Shamsunder |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Gaussian
Spherical coordinate system Higher-order statistics Azimuth Antenna array symbols.namesake Narrowband Control and Systems Engineering Signal Processing Electronic engineering symbols Computer Vision and Pattern Recognition Electrical and Electronic Engineering Algorithm Software Eigendecomposition of a matrix Eigenvalues and eigenvectors Mathematics |
| Zdroj: | Signal Processing. 65:39-53 |
| ISSN: | 0165-1684 |
| DOI: | 10.1016/s0165-1684(97)00206-5 |
| Popis: | In this paper an eigendecomposition technique based on cumulant matrices is proposed to passively localize narrowband non-Gaussian sources in the spherical coordinates, viz., azimuth, elevation and range, using signals recorded by a centro-symmetric 2-D cross array. The high-resolution algorithm exploits the multiple degrees of freedom available from cumulants to transform the near-field data into pseudo-data collected by a virtual rectangular array observing virtual far-field sources. The source locations are estimated directly from eigenvalues of certain cumulant matrices, thereby eliminating the multi-dimensional search inherent in the traditional methods like 3-D MUSIC. The centro-symmetric structure lost by a uniform linear array in the presence of near-field sources, is restored in the virtual rectangular array thus allowing efficient real-valued processing via Unitary ESPRIT. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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