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A note on argument principle

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2 Author(s)
Rusu, C. ; Tampere Int. Center for Signal Process., Tampere Univ. of Technol., Finland ; Astola, J.

The goal of this work is to show how the argument principle together with discrete Fourier transform (DFT) can be used to determine some properties of finite-length complex-valued sequences, precisely the localization of zeros with respect to unit circle of their related Z-transform. An upper bound of the DFT (in one step) length to exactly calculate the increase of the argument is also provided.

Published in:

Signal Processing Letters, IEEE  (Volume:11 ,  Issue: 10 )