Spectral averaging

摘要

Performing spectral analysis may include, for each of multiple acquisitions: a receiving a plurality of time-domain samples, cross-power spectrum analyzing first and second portions of the plurality of samples resulting in cross-power spectra, and accumulating a vector sum of the cross-power spectra including any cross-power spectra from previous acquisitions. Performing spectral analysis may also include calculating a vector average based on the accumulated vector sum and quantity of acquisitions. Performing spectral analysis may also include displaying the magnitude of the vector average.

主权项

1. A method for recovering a periodic signal from a random signal, comprising:
for each of multiple acquisitions:
receiving a plurality of time-domain samples of a single-channel signal;cross-power spectrum analyzing first and second portions of the plurality of samples to obtain a cross-power spectrum between the first and second portions; andaccumulating the cross-power spectrum into a cumulative cross-power spectrum using a vector sum of the cross-power spectrum and the cumulative cross-power spectrum; calculating a vector average cross-power spectrum based on the cumulative cross-power spectrum and the quantity of acquisitions; and displaying a magnitude function corresponding to the vector average cross-power spectrum.