Low-complexity DoA estimation based on Hermitian EVDs
Tadeu Nagashima Ferreira, Sergio Lima Netto, Marcello L. R. de Campos, Paulo S. R. Diniz · 2016
The use of a receiving array of antennas allows the system to localize multiple sources. This estimation is sometimes simplified to a direction-of-arrival (DoA) estimation. The covariance-based (CB)-DoA algorithm is a lower complexity alternative to the ESPRIT algorithm, and yet achieves similar mean-squared error (MSE) with the same geometrical constraints. This article proposes a lower complexity CB-DoA algorithm. In the proposed algorithm, the eigenvector decomposition (EVD) of a non-Hermitian matrix is substituted by two lower complexity Hermitian EVDs. The replacement of EVDs does not imply MSE degradation. Discussions on exploiting the independent processing of the new EVDs are also provided.