Hi John,
As Marcus already mentioned you can use design functions from firdes module
(gr_filter_design also uses these modules).
Martin, Josh and Tom gave me many suggestions regarding adding the designer to
GRC, so that users can launch the designer from GRC itself (something like this
http://www.youtube.com/watch?v=aqLIPHXCM1M&feature=plcp). This feature will be
added to GRC once the design tool is complete.
Thank you for your suggestions.
---
Regards
Sreeraj Rajendran
http://home.iitb.ac.in/~rsreeraj
________________________________
From: John Malsbury <[email protected]>
To: [email protected]
Sent: Tuesday, 26 June 2012 10:51 PM
Subject: Re: [Discuss-gnuradio] GSoC: Filter design enhancements progress
That is pretty awesome, Sreeraj. Is the output of the program a set of
co-efficients to be copy-pasted, a compilable block, or something else? It
might be useful to have a feature where the user can call a custom python
script with the co-efficients passed as arguments. This would allow users to
easily generate formatted files, like those used by Xilinx coregen or some
custom format that might be poked to the FPGA, for example. It would be neat
to make some updates to GRC to allow the user to open the utility and
re-generate co-efficients as they do in MATLAB.
This is making me think of some other potential projects, like a
similar 'digital modulation designer'. For example, we might use a
single block for all modulation types, select the modulation type
and parameters, run simulations to determine BER vs. Eb/N0,
theoretical discrete constellations, ACPR, PAR, etc. Or perhaps, a
"packet designer" where you can graphically configure FEC,
interleaving, sync words, etc. Obviously, the complexity on this
one could grow real fast.
Just ideas... Hopefully you'll have a chance to present your
approach to this at the GNU Radio conference.
-John
On 06/26/2012 09:35 AM, Ben Hilburn wrote:
Sreeraj -
>
>
>I just wanted to echo Tom's thoughts that this look really, really great! I
>can't wait to see the final version! This will really be a significant
>contribution to the capabilities of GNU Radio, in my opinion.
>
>
>Cheers,
>Ben
>
>
>On Sun, Jun 24, 2012 at 7:05 AM, sreeraj r <[email protected]> wrote:
>
>Hi all,
>>During the initial phase of SoC, I was concentrating on improving the GUI for
>>filter designing. A brief list of some of the major features added to the
>>filter design tool (gr_filter_design) is given below
>>
>>
>>--Support for multiple views (grid and old tabbed view)
>>
>>--Stop-band attenuation configuration via Band-diagram
>>--Editable pole-zero plots with conjugate movement support
>>--Impulse, Step responses, phase delay plots
>>--Overlay plots
>>
>>
>>A complete update history along with the code can be found in the github
>>repository(https://github.com/zeroXzero/gr-filtdes). A small video on the
>>current status of the tool can be found here
>>http://www.youtube.com/watch?v=Oi6PTrht1F8&feature=plcp
>>
>>
>>
>>The tool is not completely tested as some more bugs need to be patched. A few
>>more feature additions like add/delete buttons for poles and zeros, alignment
>>of band-diagram, addition of button icons etc are still pending. All these
>>additions will be done with in a few days. In the meantime it would be really
>>helpful if the community can provide feedback in terms of feature additions
>>or bugs so that I can improve the design.
>>
>>
>>After finishing this work I will start working on the actual IIR filter
>>designs as gr-filter has already been merged to the master.
>>
>>---
>>Regards
>>Sreeraj Rajendran
>>http://home.iitb.ac.in/~rsreeraj
>>
>>_______________________________________________
>>Discuss-gnuradio mailing list
>>[email protected]
>>https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>
>>
>
>
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