Noise source for transfer function testing

Details Noise source for transfer function testing Noise source for transfer function testing

G - Physics

06

F

354/141

G06F 17/10 (2006.01) G06F 7/70 (2006.01)

Patent

CA 1043016

NOISE SOURCE FOR TRANSFER FUNCTION TESTING Abstract of the Disclosure A method and apparatus for obtaining an accurate measure of a transfer function of either a linear or the linear part of a nonlinear system. This is accomplished by utilizing an estimation technique using a "periodic-random" stimulus consisting of a random stimulus of a finite record length that is repeatedly applied to the system under test until the stimulus and the system response become essentially periodic. Once periodicity is achieved within the desired accuracy, a first estimate of the transfer function is derived from the measured spectrums of the stimulus and the system response. Another "periodic-random" stimulus, uncorrelated with prior records, is then generated and the above procedure is repeated to achieve an average value of the transfer function within the desired accuracy. Through the use of several "periodic-random" stimuli, leakage and distortion in the measurement is minimized, thus greatly improving the accuracy of the estimation technique in measuring the transfer function of the system under test.

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