Bode plot analysis of linear discrete-time systems
Robert A. Gabel, B. Smith · IEEE Transactions on Acoustics Speech and Signal Processing · 1975
The equivalent continuous-time transfer functionH(z)|_{z=e}^{j\omegaT}of a linear discrete-time system may be evaluated using standard Bode plot techniques. The utility of these techniques is extended in this paper through a frequency-scale warping of the Bode plot and a mapping from thezplane to polar coordinates (rather than the more commonly used Cartesian coordinates) in thewplane. These graphical techniques may also be used in the preliminary synthesis of a desired transfer function. Examples are included to illustrate the use of these techniques.