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.
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Regards
Sreeraj Rajendran
http://home.iitb.ac.in/~rsreeraj