<br><font size=2 face="sans-serif">Fine with me. Bring it to the joint
RFM/NGU/C&S meeting with a proper input paper.</font>
<br>
<br><font size=2 face="sans-serif">We shall also make sure that as of the
Spring meeting NGU, C&S and RFM do not take place at the same time
unless joint.</font>
<br>
<br><font size=2 face="sans-serif">Regards, Enrico</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">"Kazz, Greg J (313B)" <greg.j.kazz@jpl.nasa.gov></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">"sls-hru@mailman.ccsds.org"
<sls-hru@mailman.ccsds.org>, "sls-ngu@mailman.ccsds.org"
<sls-ngu@mailman.ccsds.org></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">28/09/2010 14:34</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">[Sls-ngu] FW: NGU direction</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Sent by:</font>
<td><font size=1 face="sans-serif">sls-ngu-bounces@mailman.ccsds.org</font></table>
<br>
<hr noshade>
<br>
<br>
<br><font size=2 color=#004080 face="Calibri">All,</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri">I welcome the discussion
within NGU on Ed’s ideas below.</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri">Ed is pointing out that a
lot of the functionality that NGU would require to advance the state of
the art of the current TC standard is within the scope of functionality
of the on-board radio. Another aspect he did not touch upon is link layer
security – this function could also be done within the radio.</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri">Thanks,</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri">Greg</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 face="Tahoma"><b>From:</b> Greenberg, Edward (313B) <b><br>
Sent:</b> Monday, September 27, 2010 4:06 PM<b><br>
To:</b> Lee Pitts; Victor Sank; Shames, Peter M (313B); SDLS WG; Howie
Weiss; Johnson, Charles E (4400-Affiliate); Kazz, Greg J (313B); David
Israel; Moe Kluksdahl; Lindolfo Martinez; Gain Paolo Calzolari; Takahiro
Yamada; Edwards, Charles D (6000); Pollara, Fabrizio (3320); Hamkins, Jon
(332B); Andrews, Kenneth S (332B); Hooke, Adrian J (9000); Lee, Dennis
K (332C); Gilles Moury; Guy Lesthievent<b><br>
Subject:</b> NGU direction</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=2 face="Calibri"><br>
I have been searching for a way to achieve a new a effective uplink and
keep running into stone walls. The following is what I understand:<br>
<br>
A. If we want to get better uplink coding gain the onboard transponder
needs to be upgraded to accomplish the following:</font>
<br><font size=2 face="sans-serif">1. </font><font size=2 face="Calibri">The
receiver must provide soft symbols to the code decoder </font>
<br><font size=2 face="sans-serif">2. </font><font size=2 face="Calibri">The
receiver design should require less power in the carrier to allow more
powe</font><font size=2 color=#004080 face="Calibri">r</font><font size=2 face="Calibri">
in the data. </font>
<br><font size=2 face="sans-serif">3. </font><font size=2 face="Calibri">The
receiver should provide a mechanism to perform time correlation in the
ranging syatem </font>
<br><font size=2 face="sans-serif">4. </font><font size=2 face="Calibri">The
transceiver should be capable of providing ranging in the TLM channel when
the ranging rate is lower than the data rate</font>
<ul>
<li><font size=2 face="Calibri">This will effect the TLM rate because of
interference but we should determine its accepability</font></ul><font size=2 face="Calibri">B.
The requirement for short command with low receiver latency for emergency
commanding in tumbling events has significantly decreased or vanished.</font>
<ul>
<li><font size=2 face="Calibri">Near earth missions have lots of power
to support high rates even to omni antennas </font>
<li><font size=2 face="Calibri">deep space missions require safe modes
for responding to anomalies with reduced but constant communication connections</font></ul><font size=2 face="Calibri">C.
Better codes like the 1024 rate 1/2 LDPC code can provide 8db performance
improvement.</font>
<ul>
<li><font size=2 face="Calibri">This can be accomplished using a TC lite
protocol eliminating the BCH code or using AOS with frames locked to codeblocks.</font></ul><font size=2 face="Calibri"><br>
<br>
So maybe the NGU WG should be expanded to include </font><font size=2 color=#004080 face="Calibri">Radio</font><font size=2 face="Calibri">
person</font><font size=2 color=#004080 face="Calibri">n</font><font size=2 face="Calibri">el
(including the Software defined radio), R.F. Modulation and link and coding
protocol personnel. </font><font size=3 face="Times New Roman"> </font><tt><font size=2>_______________________________________________<br>
SLS-NGU mailing list<br>
SLS-NGU@mailman.ccsds.org<br>
</font></tt><a href="http://mailman.ccsds.org/cgi-bin/mailman/listinfo/sls-ngu"><tt><font size=2>http://mailman.ccsds.org/cgi-bin/mailman/listinfo/sls-ngu</font></tt></a><tt><font size=2><br>
</font></tt>
<br>
<br>