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From: dileep kumar arava on 27 Mar 2010 06:46
hi, iam trying to observe the frequency response of bp filter. I am taking two sine signals of 10mhz and 15mhz, bandpass frequencies are fstop1- 5mhz,fpass1-8mhz,fpass2-12mhz and fstop2-15mhz,but the output response of fft giving two signals of 10&15mhz.
b.p filter parameters i mentioned are ..
impulse response-fir
ordermode-specify-3
filtertype-interpolator factor of 2
fs=100mhz
design method equiripple
struct-di-form-fir poly-interpolator

please help me to find out where iam going wrong
From: Wayne King on 27 Mar 2010 07:57
"dileep kumar arava" <balu_dil11(a)yahoo.co.in> wrote in message <hoknld$akh$1(a)fred.mathworks.com>...
> hi, iam trying to observe the frequency response of bp filter. I am taking two sine signals of 10mhz and 15mhz, bandpass frequencies are fstop1- 5mhz,fpass1-8mhz,fpass2-12mhz and fstop2-15mhz,but the output response of fft giving two signals of 10&15mhz.
> b.p filter parameters i mentioned are ..
> impulse response-fir
> ordermode-specify-3
> filtertype-interpolator factor of 2
> fs=100mhz
> design method equiripple
> struct-di-form-fir poly-interpolator
>
> please help me to find out where iam going wrong

Hi Dileep, Can you show how you are designing your polyphase interpolator?

Wayne
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