On Wed, Oct 13, 2010 at 2:06 PM, Rafael D. [email protected] wrote:
Tom,
Can you make the materials of the tutorial available?
Cheers,
Rafael D.
Indeed I will. Once it’s complete, I’ll upload it to the website with
the examples.
Unfortunately, the way that I tend to give presentations leaves a lot
out of the actual handout material. That is, I really try to make the
presentation slides as support to what I’m saying, so I feel they will
lose something without the actual talk along with it. Also, since this
is a tutorial, I’ll be going through actual code examples live, which
again, might miss some specifics after the fact.
Even still, I’ll provide the material. I’m also going to try an
experiment where I am going to attempt to record the audio via a
Bluetooth headset. If I get that working, I’ll post the audio file
along with the presentation. No promises on that one though…
Tom
Yes, I was talking about the PFB blocks. Thanks.
However, the comparison result of IIR and FIR in terms of computational
efficiency is a little disappointing; I had hoped that IIR can be
better.
Andrew
On 10/16/2010 5:18 PM, Tom R. wrote:
Thanks,
on hold while we get some other stuff going. Regarding these filters,
Message: 1
wrote:
list and b) pretty incoherent. We have a few big ideas coming down the
2. Refactor the build system. This is pretty major from the developers
make it easier to understand how things interact. Exposing the second
There are a few other ideas coming out soon that I want to announce
before December. My timeline here is due to a tutorial on GNU Radio
that I am giving at the WinnForum’s SDR Technical Conference.
So more soon, but I hope that helps give you some clues as to where we
are headed.
Tom
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On Wed, Oct 13, 2010 at 1:20 PM, Andrew Ge [email protected] wrote:
Andrew
Andrew,
I’m not entirely sure which filter work you are talking about. If
you’re thinking of the polyphase filterbank stuff, all of those are in
gnuradio-core/src/lib/filters/gr_pfb_*. You can see examples of all of
them in gnuradio-examples/python/pfb. In fact, I’m about to push the
synthesis filterbank block right now, which mostly completes the PFB
blocks.
There’s some other IIR work that I started a while ago that’s been put
on hold while we get some other stuff going. Regarding these filters,
they turn out to not be too much more efficient than the equivalent
FIR filter; especially when you use the FFT version of the FIRs. What
you get out of the IIR filters, though, is a lower group delay.
Because I’ve been mostly concerned with speed and not group delay,
when I got the numbers back from the IIR filters, it dropped lower on
my list of things to complete.
Tom