saurabhmimani
Junior Member level 1
matlab filter coefficients
Hi all,
i was designing a FIR root raised cosine filter to use for my project of QPSK transmitter for pulse shaping purpose, first thing is I found following impulse response for rrc filter:-
(taken from wikipedia)
what I was planning to do is find h[nT] and than convolution it with input sequence.
where T is sampling time
Am I doing right or I should modify my approach as there is no mention about cutoff frequency or control on stopband attenuation.
After it I designed a FIR rrc filter using FDA tool of MATLAB, I found out the coefficients using FDA toll than I went in help and found that it uses following formula-
**broken link removed**
and i found coefficients using this formula but they are not matching , why is this and also using the formula i am not getting appropriate response.
Can somone help me why this is happening.
Thank You.
Hi all,
i was designing a FIR root raised cosine filter to use for my project of QPSK transmitter for pulse shaping purpose, first thing is I found following impulse response for rrc filter:-
(taken from wikipedia)
what I was planning to do is find h[nT] and than convolution it with input sequence.
where T is sampling time
Am I doing right or I should modify my approach as there is no mention about cutoff frequency or control on stopband attenuation.
After it I designed a FIR rrc filter using FDA tool of MATLAB, I found out the coefficients using FDA toll than I went in help and found that it uses following formula-
**broken link removed**
and i found coefficients using this formula but they are not matching , why is this and also using the formula i am not getting appropriate response.
Can somone help me why this is happening.
Thank You.