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Signal spectrum analysis and period estimation by using delayed signal sampling

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3 Author(s)
Peretto, L. ; Dipartimento di Ingegneria Elettrica, Bologna Univ., Italy ; Pasini, G. ; Muscas, C.

The paper describes a signal power spectrum analyzer and a signal period estimator whose bandwidth is not limited by the mean sampling time. The procedure relies on the evaluation of the input signal autocorrelation function in different delayed time instants, located at either equispaced or random time instants. To do this, a recursive random sampling process in the time domain was used in order to avoid any bandwidth limitation due to the sampling strategy in the evaluation of each autocorrelation function. The signal power spectrum as well as its period, provided that an approximate value of the fundamental frequency is known, can finally be evaluated. Some theoretical background and experimental work are reported in the paper for validating the performance of the method

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:50 ,  Issue: 4 )

Date of Publication:

Aug 2001

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