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ztransform - Bode plot problem
In short, I expect in the frequency domain a correct display of frequency AND amplitude. As you said, the frequency shows up correctly. But I wrote also in this thread that the amplitude is not correct (several hundreds instead of 1 for a simple sine wave). So why is the amplitude off in a...- bmalp
- Post #7
- Forum: MathWorks, Inc.: MATLAB
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ztransform - Bode plot problem
VisiGoth, thanks for your explanations. They confirm that the sine wave is an unstable signal - it oscillates. So we still have the situation that the z-transform of the sine being correct (confirmed from a transforms table), does not show up correctly in a Bode plot. How to get out of this...- bmalp
- Post #5
- Forum: MathWorks, Inc.: MATLAB
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ztransform - Bode plot problem
Hi Visigoth, thanks for your reply and cleaning the code. What amplitude I actually expect? Well, starting from sin( w * n * Ts + phi ) I would expect min = -1 and max = 1, or an amplitude of 1, right? The amplitudes obtained by both methods are a) different and b) simply wrong - why...- bmalp
- Post #3
- Forum: MathWorks, Inc.: MATLAB
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ztransform - Bode plot problem
Hi, I try to visualize a sine wave, z-transformed in a Bode plot. The frequency shows up correctly, but the amplitude is way off - why? Thanks for your comments. Bmalp function zdemo format compact syms w Ts n z phi t Ts = 1 w = 0.1 phi = 0 vz = simplify(ztrans(sin(w*n*Ts+phi))) %...- bmalp
- Thread
- Replies: 7
- Forum: MathWorks, Inc.: MATLAB
