Estimating frequency-response function using periodic signals and the f.f.t. |
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| Authors: | Nichols S.T. Dennis L.P. |
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| Affiliation: | University of Calgary, Department of Electrical Engineering, Calgary, Canada; |
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| Abstract: | A technique for estimating a frequency-response function using a periodic pseudorandom binary sequence which is compatible with the fast-Fourier-transform algorithm is presented. A method of synchronising the p.r.b.s. and the sampling for the f.f.t. using a single clock source and two binary counters is described. A simple check on the synchronisations and the identification of an 8th-order lowpass Butterworth filter is provided. |
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