Re: [Discuss-gnuradio] CIC stop band

[Eng. Firas]

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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