Hi all,
I need a help in ploting the OFDM Spectral shape using matlab, so that I can
always visualize the adjacent channel interference. Any idea or matlab codes
would be of great help.
Rgds,
Jasan
Reply by Nandan Das●May 1, 20062006-05-01
Use the invfreqz command...here is a snippet from its help. I think it will
do what you want.
Nandan
[B,A] = INVFREQZ(H,W,NB,NA) gives real numerator and denominator
coefficients B and A of orders NB and NA respectively, where
H is the desired complex frequency response of the system at frequency
points W, and W contains the normalized frequency values within the
interval [0, Pi] (W is in units of radians/sample).
On 4/28/06, s...@qualcorelogic.com wrote: >
> hi everybody,
> I don't know much about Matlab. I have just started working on matlab.
Now
> I want to design a filter using remez algorithm. I have my own freq.
> response;
> specified freq. response is not standard lowpass, highpass, bandpass or
> bandstop. Basically it is lowpass but its band pass region is a parabolic
> curve. So I was taking inverse fft of the freq spectre and then I was
> applying window on it. But in matlab even inverse fft is not giving me
> correct results.
> Can anybody suggest me the way to design the filter ?
> Thanks
>
Reply by suni...@qualcorelogic.com●April 28, 20062006-04-28
hi everybody,
I don't know much about Matlab. I have just started working on matlab. Now
I want to design a filter using remez algorithm. I have my own freq.
response;
specified freq. response is not standard lowpass, highpass, bandpass or
bandstop. Basically it is lowpass but its band pass region is a parabolic curve.
So I was taking inverse fft of the freq spectre and then I was applying window
on it. But in matlab even inverse fft is not giving me correct results.
Can anybody suggest me the way to design the filter ?
Thanks