<span style=" font-size:10pt;font-family:sans-serif">Dear Jon, </span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Thanks for summarizing
the channel model and the parameters' values.</span>
<br><span style=" font-size:10pt;font-family:sans-serif">In principle we
are fine with them, but we would like to understand the motivation for
having all the powers (i.e., the signal power and noise variances) normalized
as dimensionless quantities, instead of having them in watts - which is
probably more intuitive, at least from an engineering point of view. Could
you please confirm that this is indeed the case and elaborate a bit on
your choice?</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Thanks a lot in
advance!</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Kind regards,
<br>
</span>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:8pt;color:#808080;font-family:Verdana"><b>Modis
for ESA - European Space Agency</b></span><span style=" font-size:12pt;font-family:Tms Rmn">
</span><span style=" font-size:8pt;color:#00a1e0;font-family:Verdana"><br>
<br>
Nicoḷ Mazzali, PhD </span><span style=" font-size:8pt;color:#808080;font-family:Verdana"><br>
Communication Systems & Technologies Engineer</span><span style=" font-size:12pt;font-family:Tms Rmn">
</span><span style=" font-size:8pt;color:#808080;font-family:Verdana"><br>
<br>
Telecommunications Section (TEC-ESC)</span><span style=" font-size:12pt;font-family:Tms Rmn">
</span><span style=" font-size:8pt;color:#808080;font-family:Verdana"><br>
Radio Frequency Systems Division (TEC-ES)</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:8pt;color:#808080;font-family:Verdana">Directorate
of Technology, Engineering & Quality (D/TEC)<b><br>
<br>
<br>
ESTEC</b><br>
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NL-2200 AG Noordwijk, The Netherlands</span><span style=" font-size:8pt;color:#0082bf;font-family:Verdana"><u><br>
</u></span><a href=mailto:nicolo.mazzali@esa.int><span style=" font-size:8pt;color:#0082bf;font-family:Verdana"><u>nicolo.mazzali@esa.int</u></span></a><span style=" font-size:8pt;color:#808080;font-family:Verdana">
| </span><a href=http://www.esa.int/><span style=" font-size:8pt;color:#8f8f8f;font-family:Verdana"><u>www.esa.int</u></span></a><span style=" font-size:8pt;color:#808080;font-family:Verdana"><br>
T +31 71 56 53215</span></p>
<br>
<br>
<br>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">From:
</span><span style=" font-size:9pt;font-family:sans-serif">"Jon
Hamkins via SLS-OPT" <sls-opt@mailman.ccsds.org></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style=" font-size:9pt;font-family:sans-serif">"SLS-OPT@mailman.ccsds.org"
<SLS-OPT@mailman.ccsds.org></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style=" font-size:9pt;font-family:sans-serif">15/04/2020
17:20</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style=" font-size:9pt;font-family:sans-serif">[SLS-OPT]
O3K channel model</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Sent
by: </span><span style=" font-size:9pt;font-family:sans-serif">"SLS-OPT"
<sls-opt-bounces@mailman.ccsds.org></span>
<br>
<hr noshade>
<br>
<br>
<br><span style=" font-size:12pt">Attached is the O3K channel model we
discussed yesterday. It also contains a suggestion for how to state
the O3K coding performance. I welcome your comments. If we
can agree to the model in the next week or so, each agency may be able
to begin simulating with it and discuss some initial results at the May
teleconferences.</span>
<br><span style=" font-size:12pt">A few notes:</span>
<ul>
<li><span style=" font-size:12pt">I am suggesting we study 10 Gsps, 78.125
Msps, and 1.22 Mbps, since those include the highest and lowest data rates
and one in the middle.</span>
<li><span style=" font-size:12pt">I don't have a good suggestion for the
TIA noise density at 1.22 Msps. Dirk, would you be able to supply
a number?</span>
<li><span style=" font-size:12pt">I have algebraically simplified the expressions
for the means and variances. You can compare the model to the expressions
Dariush presented on yesterday (p. 5), and check my algebra.</span>
<li><span style=" font-size:12pt">I have included the fading parameter
as well. Just set rho=1 if you want no fading.</span></ul><span style=" font-size:12pt">
----Jon</span>
<br><span style=" font-size:12pt">-- <b><br>
Jon Hamkins</b><br>
Lead Technologist<br>
33 | Communications, Tracking, and Radar Division<b><br>
O</b> 818-354-4764 | <b>M</b> 626-658-6220 <br>
<b><br>
JPL</b> | jpl.nasa.gov [attachment "2020-04-15-O3K-channel-model.pptx"
deleted by Nicolo Mazzali/estec/ESA] </span>
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