caa a22 4500 606205357 CHVBK 20210128101006.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s00034-014-9966-3 doi (NATIONALLICENCE)springer-10.1007/s00034-014-9966-3 Covariance-Based DoA Estimation in a Krylov Subspace [Elektronische Daten] [Tadeu Ferreira, Marcello de Campos, Sergio Netto] Covariance-based DoA estimation (CB-DoA) algorithms represent lower computational complexity alternatives to the traditional ESPRIT approach. This paper investigates CB-DoA using Krylov-subspace techniques (including Arnoldi's and Lanczos' updates) with respect to the resulting computational cost and estimation error performance. The proposed modifications also allow an automatic estimation of the number of sources. Computational analyses performed for the resulting CB-DoA algorithm indicate cost savings above $$60\,\%$$ 60 % in comparison with the standard CB-DoA implementation, which already represents a $$20\,\%$$ 20 % improvement upon its ESPRIT counterpart, at an equivalent mean squared error level, as verified in numerical simulations. Springer Science+Business Media New York, 2015 Direction of arrival nationallicence Eigendecomposition nationallicence Antenna array nationallicence Ferreira Tadeu Telecommunication Engineering Department, Fluminense Federal University, 24210-240, Niterói, RJ, Brazil aut de Campos Marcello Electrical Engineering Program - COPPE, Federal University of Rio de Janeiro, 21941-972, Rio de Janeiro, RJ, Brazil aut Netto Sergio Electrical Engineering Program - COPPE, Federal University of Rio de Janeiro, 21941-972, Rio de Janeiro, RJ, Brazil aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/7(2015-07-01), 2363-2379 0278-081X 34:7<2363 2015 34 34 https://doi.org/10.1007/s00034-014-9966-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-014-9966-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ferreira Tadeu Telecommunication Engineering Department, Fluminense Federal University, 24210-240, Niterói, RJ, Brazil aut NATIONALLICENCE 700 1- de Campos Marcello Electrical Engineering Program - COPPE, Federal University of Rio de Janeiro, 21941-972, Rio de Janeiro, RJ, Brazil aut NATIONALLICENCE 700 1- Netto Sergio Electrical Engineering Program - COPPE, Federal University of Rio de Janeiro, 21941-972, Rio de Janeiro, RJ, Brazil aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/7(2015-07-01), 2363-2379 0278-081X 34:7<2363 2015 34 34