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Re: [Discuss-gnuradio] CIC stop band
From: |
Eng. Firas |
Subject: |
Re: [Discuss-gnuradio] CIC stop band |
Date: |
Thu, 17 May 2007 09:55:33 -0700 (PDT) |
Thank you Brian & Matt
Using Matt HBF coefficients given by the verilog file [coeff_rom.v], I did
the HBF frequency response analysis by MATLAB FDATOOL. Attached is the USRP
HBF result frequency response. As we can see, there is a 6 dB passband gain.
In my next step, I will try to provide the frequency response of the
cascaded USRP CIC+HBF sections.
Regards,
Firas
http://www.nabble.com/file/8495/USRP%20HBF.JPG USRP HBF.JPG
Matt wrote:
> Hello,
>
> I can give you a precise MATLAB based simulated USRP frequency
response. All
> what I need is the HBF coefficients. So this is an open invitation to
our
> dear Matt to give us his designed USRP HBF coefficients or frequency
> response.
>
> Firas,
>
The coefficients are here:
http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/fpga/sdr_lib/hb/coeff_rom.v
Matt
Brian Padalino wrote:
>
> On 5/17/07, Eng. Firas <address@hidden> wrote:
>>
>> Hello,
>>
>> I can give you a precise MATLAB based simulated USRP frequency response.
>> All
>> what I need is the HBF coefficients. So this is an open invitation to our
>> dear Matt to give us his designed USRP HBF coefficients or frequency
>> response.
>
> Reading the documentation in the Verilog source file is helpful:
>
> http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/fpga/sdr_lib/hb/halfband_decim.v
>
> The coefficient ROM is located here:
>
> http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/fpga/sdr_lib/hb/coeff_rom.v
>
>> Firas
>
> Brian
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
--
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Re: [Discuss-gnuradio] CIC stop band, Robert McGwier, 2007/05/17