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发信人: Bruce (君子兰), 信区: Control
标 题: matlab's fft function maybe has a bug!!!!
发信站: 紫 丁 香 (Tue May 25 21:15:20 1999), 转信
I had to use fft function of matlab to get the amplify and phase
information,the amplify part is correct,but the phase info is
not.
The situation that I encountered described in the following:
y(t)=sin(2*pi*50.0*t+1.0)
and the sampling rate is 2000 per second
the total counter of the samples is 10000
after fft processing,the phase is not 1.0
When I used a program that I searched in library,the result was
correct.
If you do NOT believe it,please have a try.
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