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Frequency estimation by principal component AR spectral estimation method without eigendecomposition

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2 Author(s)
S. M. Kay ; Dept. of Electr. Eng., Rhode Island Univ., Kingston, RI, USA ; A. K. Shaw

An eigenvalue filtering method is proposed that applies a transformation to an autocorrelation matrix, which has the effect of truncating the undesired eigenvalues so that the corresponding matrix function closely approximates the pseudoinverse. It is shown using a computer simulation that compared to the forward-backward method, the proposed method enhances the threshold in SNR by about 6-8 dB. Further improvement is obtained by a simple subset selection method and a second eigenvalue filtering iteration

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IEEE Transactions on Acoustics, Speech, and Signal Processing  (Volume:36 ,  Issue: 1 )