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Random Signal Method of Nonlinear Amplitude Distortion Measurement

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1 Author(s)
Koch, Roland W. ; Department of Electrical Engineering, University of Kentucky, Lexington, Ky.

The degree and orders of nonlinearity of a system can be determined by the use of a random test signal. A Gaussian-distributed random signal with a uniform power spectral density except for a narrow spectral notch is used as an input test signal. The power within the notch at the system output is a measure of the degree of system nonlinearity. Relative variations of the output power within the notch with input loading identify the orders of nonlinearity.

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:IM-20 ,  Issue: 2 )

Date of Publication:

May 1971

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