filtering with fdatool

[yamid]

hello all,
i'm trying to get a bandpass filter for frequency 42.8MHz (as you can see in picture below), but dont matter what i try with the fdatool it doesnt work.


fcarr=10.7e+6;% Carrier frequency(Hz)
fs=2*6*fcarr; %sample fequency

can somebody help me??

 

[seyed mojtaba]

hello all,
i'm trying to get a bandpass filter for frequency 42.8MHz (as you can see in picture below), but dont matter what i try with the fdatool it doesnt work.
View attachment 69794

fcarr=10.7e+6;% Carrier frequency(Hz)
fs=2*6*fcarr; %sample fequency

can somebody help me??

Hi,
u can try this steps in matlab:
1)>>fdatool
2)response type---->>> Bandpass
3)design method---->>>FIR,Remez,Equiripple
4)change Filter specification
5)select Filter Order
6)Option Adjustment
7)ADJUSTMENT: freq.unit,sample freq,fpass,fstop
8)magnitude specification adjustment
9)click on design filter

 

[yamid]

seyed mojtaba thank you for your reply.
I followed your instructions and managed to filter the desired frequency but the results are accurate only in the spectrum and not in time.
in time unwanted peaks is obtained (as you can in the picture below).

Do you or even someone else knows why this happens?

 

[seyed mojtaba]

ok.
firstly you must be use smoothing filter for your signal and then use main filter.