how can I change lowpass filter form?
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Hi~ I need to generate band-limited Gaussian white noise signal with frequency between 0 and 13Hz and an amplitude ±20.
The sampling frequency is 200Hz.
if sampling frequency is changed, how can I write the number in this form?
>>lowpass('Fp,Fst,Ap,Ast',x,x,x,x,Fs);
Please help me...
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David Sanchez
2013 年 7 月 25 日
The string entries are defined as follows:
Ap — amount of ripple allowed in the pass band in decibels (the default units). Also called Apass.
Ast — attenuation in the stop band in decibels (the default units). Also called Astop.
Fc — cutoff frequency for the point 6 dB point below the passband value. Specified in normalized frequency units.
Fp — frequency at the start of the pass band. Specified in normalized frequency units. Also called Fpass.
Fst — frequency at the end of the stop band. Specified in normalized frequency units. Also called Fstop.
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