Simplified High-order DOA and Range Estimation with Linear Antenna Array
Résumé
In this letter, we propose a new efficient method to
estimate the direction-of-arrival (DOA) and range of near-field
sources in a decoupled way. Firstly, a non-Hermitian cumulant
matrix is constructed, whose eigenvectors associated with zero
eigenvalues are used to directly estimate the DOA by using
the MUSIC algorithm. Then the ranges are estimated with the
estimated DOA by orthogonalizing the remained eigenvectors.
Compared with other modified two-dimensional (2D) MUSIC,
the proposed algorithm can greatly reduce the computational
complexity by avoiding a 2D search with only one matrix and
one eigenvalue decomposition (EVD). Simulation results show the
effectiveness of the proposed method.