An accurate method for estimating the direction-of-arrival (DOA) jointly with the frequencies of an unknown number of source signals is proposed using the Eigen-approach. Using the minimum eigenvalues of the autocorrelation matrices produces both the DOA and the corresponding frequencies.
By moving the roots produced from the eigenvector one-by-one, the angular location is first found. The frequency is then estimated using the same procedure. Finally, the frequency is used with the angular location to estimate the DOA angle.
The results show an accurate estimation of source signalsÂ’ DOA and frequency in the presence of different levels of noise.
Key words: Direction-of-arrival (DOA), Antenna arrays, Eigenvalues, Eigenvectors, Frequency estimation.
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