A DSP technique that transforms a digital signal by warping the frequency axis is discussed. The technique corresponds to a mapping of the samples in the z-domain such that they are unevenly spaced around the unit circle. A spectral warping network has the property that a time-shifted impulse function is transformed into a chirp function. This can have useful applications in the analysis of the device-under-test frequency response in electronic testing of analogue and mixed-signal circuits/systems.
Test chirp signal generation using spectral warping / W. Allen, D. Bailey, S. Demidenko, V. Piuri - In: The first IEEE International workshop on electronic design, test and applications : 29-31 january 2002, Christchurch, New Zealand : proceedingsPiscataway : Institute of electrical and electronics engineers, 2002. - ISBN 0769514537. - pp. 492-495 [10.1109/DELTA.2002.994682]
Test chirp signal generation using spectral warping
V. PiuriUltimo
2002
Abstract
A DSP technique that transforms a digital signal by warping the frequency axis is discussed. The technique corresponds to a mapping of the samples in the z-domain such that they are unevenly spaced around the unit circle. A spectral warping network has the property that a time-shifted impulse function is transformed into a chirp function. This can have useful applications in the analysis of the device-under-test frequency response in electronic testing of analogue and mixed-signal circuits/systems.
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