Passive near-field localization of multiple non-Gaussian sources in 3-D using cumulants. (English) Zbl 0900.94017

Challa, Raghu N.; Shamsunder, Sanyogita

Signal Process. 65, No. 1, 39-53 (1998).

Summary: 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.

MSC:

94A12	Signal theory (characterization, reconstruction, filtering, etc.)
65F99	Numerical linear algebra

Keywords:

Antenna arrays; 3-D source location; Passive listening; Near-field; Cumulants; Higher-order statistics; DOA; ESPRIT