Iterative space reduction techniques for sinusoid detection: some examples and open lines

The idea of improving frequency detection by considering any sinusoids that might be present and reducing them by means of an iterative algorithm is an immediate generalization that has been obtained from classical bandlimited harmonic signal extrapolation algorithms. The origin of the approach is presented, and its application is discussed for the case when more elaborate frequency detection schemes, such as Wiener filtering and signal subspace-noise subspace methods, are used. Relaxed reduction techniques are also considered