More compartment resolution based estimation of a spectral power density

摘要

It is generally a technique for a more compartment resolution based described estimation of a spectral power density. According to some embodiments of the invention, a first spectral power density (psd) of a signal are calculated, in order to a first frequency resolution, and one for psd associated first error variance value (ev - value) to determine. The first psd can be done using a smaller number of segments of the signal are calculated, in order to achieve a higher resolution. The higher resolution is accompanied by a higher ev, and, on the basis of the smaller number of segments which, for the calculation of the first psd be used. Next, a second psd with the use of the signal are calculated, and in this connection, a larger number of segments is scanned, about a second resolution and to determine a second ev. The second psd can be associated with a lower ev, and, on the basis of the additional segments, which for the calculation of the second psd be used. Lack of variable frequency of the second psd can, under the use of the first resolution and the second ev by means of an expectation - maximization - method can be determined.