S. Itzikowitz et A. Averbuch, GENERAL SMOOTHING TECHNIQUES FOR ESTIMATING DETERMINISTIC UNDAMPED SINUSOIDAL FREQUENCIES FROM NOISY DATA, IEEE transactions on signal processing, 41(4), 1993, pp. 1698-1701
General high-resolution smoothing techniques for estimating determinis
tic sinusoidal frequencies from short-record noisy data, are presented
. Symmetric smoothings are proven to provide conjugate reciprocals pol
ynomial roots also in the noisy case and thereby eliminate spurious fr
equency estimates. In numerical simulations they provided the lowest t
hreshold of any currently existing method.