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 <srees4sr...@yahoo.co.in
<mailto:srees4sr...@yahoo.co.in>> 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
<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 <http://home.iitb.ac.in/%7Ersreeraj>
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