<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>Here's a 2 minute 46 second video showing the LDPC block in
action with some very noisy QPSK. For that run, there were only 9
uncorrected bits out of 87,350,400.</p>
<p>File length is 116,752,397 bytes.</p>
<p><a class="moz-txt-link-freetext" href="http://www.w6rz.net/ldpc.mp4">http://www.w6rz.net/ldpc.mp4</a></p>
<p>The repository is at:</p>
<p><a class="moz-txt-link-freetext" href="https://github.com/drmpeg/gr-dvbldpc">https://github.com/drmpeg/gr-dvbldpc</a></p>
<p>Ron W6RZ<br>
</p>
<div class="moz-cite-prefix">On 10/25/18 09:17, Michelle Thompson
via Ground-Station wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CACvjz2V15w_uHf2sMdWXQvbmXJg8yvxp6zjRPJjJZ+7bP_XhFA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Update: Ron W6RZ has a draft GNU Radio block in
progress. <br>
<br>
Ahmet also has BCH code. As you all know, DVB-S2/X uses
concatenated LDPC-BCH forward error correction. We have spent
some time talking about and learning about LDPC, but BCH is in
there too. <br>
<br clear="all">
<div>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">
<div dir="ltr">-Michelle W5NYV<br>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="gmail_quote">
<div dir="ltr">On Wed, Oct 24, 2018 at 1:56 PM Ahmet Inan <<a
href="mailto:xdsopl@gmail.com" moz-do-not-send="true">xdsopl@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Fixed it on
the master branch.<br>
<br>
Ahmet<br>
On Wed, Oct 24, 2018 at 10:21 PM Michelle Thompson<br>
<<a href="mailto:mountain.michelle@gmail.com"
target="_blank" moz-do-not-send="true">mountain.michelle@gmail.com</a>>
wrote:<br>
><br>
> Just keeping everyone in the loop:<br>
><br>
> Ron reports that if we want Ubuntu 16.04 compatibility,
then it has to work with gcc 5.4. He says that specifically,
std::clamp isn't available.<br>
><br>
> -Michelle W5NYV<br>
><br>
> On Wed, Oct 24, 2018 at 5:23 AM Ahmet Inan <<a
href="mailto:xdsopl@gmail.com" target="_blank"
moz-do-not-send="true">xdsopl@gmail.com</a>> wrote:<br>
>><br>
>> Yeah, I did the math last night to get soft
information from BPSK,<br>
>> QPSK and 8PSK modulation and it would be nice if
someone could look<br>
>> over it.<br>
>> I am not entirely sure if I got the SNR stuff right
but it works very well.<br>
>><br>
>> Also, please beware that my 8PSK is Pi/8 rotated.<br>
>><br>
>> I put the new PSK stuff into the psk branch in order
not to disturb<br>
>> the others using the master tree:<br>
>> <a href="https://github.com/xdsopl/LDPC/tree/psk"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://github.com/xdsopl/LDPC/tree/psk</a><br>
>><br>
>> Ahmet<br>
>> On Wed, Oct 24, 2018 at 1:32 PM Michelle Thompson<br>
>> <<a href="mailto:mountain.michelle@gmail.com"
target="_blank" moz-do-not-send="true">mountain.michelle@gmail.com</a>>
wrote:<br>
>> ><br>
>> > Thank you Ahmet.<br>
>> ><br>
>> > I believe your next goal is performance
improvements with PSK?<br>
>> ><br>
>> > Is there anything that we can do to help out
with this part?<br>
>> ><br>
>> > -mdt<br>
>> ><br>
>> > On Tue, Oct 23, 2018, 23:30 Ahmet Inan <<a
href="mailto:xdsopl@gmail.com" target="_blank"
moz-do-not-send="true">xdsopl@gmail.com</a>> wrote:<br>
>> >><br>
>> >> Just fixed the few issues regarding g++
compatibility.<br>
>> >> You can switch between clang++ and g++ in
the Makefile.<br>
>> >><br>
>> >> Ahmet<br>
>> >> On Wed, Oct 24, 2018 at 8:17 AM Michelle
Thompson via Ground-Station<br>
>> >>
<a class="moz-txt-link-rfc2396E" href="mailto:ground-station@lists.openresearch.institute"><ground-station@lists.openresearch.institute></a> wrote:<br>
>> >> ><br>
>> >> > Ron reports that the Clang dependency
is problematic. A conversion to gcc will/should be discussed.<br>
>> >> ><br>
>> >> ><br>
>> >> ><br>
>> >> > On Tue, Oct 23, 2018, 14:25 Michelle
Thompson <<a href="mailto:mountain.michelle@gmail.com"
target="_blank" moz-do-not-send="true">mountain.michelle@gmail.com</a>>
wrote:<br>
>> >> >><br>
>> >> >> We heard some good news yesterday.<br>
>> >> >><br>
>> >> >> But there is bad news!<br>
>> >> >><br>
>> >> >> The bad news is that we aren't done
yet, and have plenty to do!<br>
>> >> >><br>
>> >> >> I'm working on getting the DVB-S2/X
code donation from Aerospace Corporation (offered at the
GRCon18 Block Party) into the code base of GNU Radio. In the
meantime, we have a recently published open source LDPC
repository that we should look at, right now.<br>
>> >> >><br>
>> >> >> <a
href="https://github.com/xdsopl/LDPC" rel="noreferrer"
target="_blank" moz-do-not-send="true">https://github.com/xdsopl/LDPC</a><br>
>> >> >><br>
>> >> >> This is written by Ahmet Inan,
Co-founder & CEO aicodix GmbH. They are located in Germany
and is on our Slack.<br>
>> >> >><br>
>> >> >> Recent bugs in this codebase have
been sorted out. Can we get this into a GNU Radio block and
tested ASAP?<br>
>> >> >><br>
>> >> >> There is at least one other
potential code base from a local LDPC expert, but it needs
some work before release.<br>
>> >> >><br>
>> >> >> Can we get something ready for
review by this weekend?<br>
>> >> >><br>
>> >> >> -Michelle W5NYV<br>
>> >> >><br>
>> >> >><br>
>> >> > <br>
</blockquote>
</div>
</blockquote>
</body>
</html>