<span style=" font-size:10pt;font-family:sans-serif">Dear all,</span>
<br><span style=" font-size:10pt;font-family:sans-serif"> I did not
receive any comment about the VCM BB from the WG.</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">However, considering
the outcome of the DVB-S2 BB review we had today, I have myself a comment.
</span>
<br><span style=" font-size:10pt;font-family:sans-serif">We aligned the
SCCC and DVB-S2 BBs for having a sentence that states the need to
consider CCSDS 401 BB.</span>
<br><span style=" font-size:10pt;font-family:sans-serif">On the same line,
I would propose to modify Section 2 as provided below (italic part highlights
the addition).</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">You can find in
attachment also the word file in tracking-changes mode for your convenience.</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Please let me
know if there is any objection, or additional point to consider, <u>no
later than 12th July EOB</u>.</span>
<br><span style=" font-size:10pt;font-family:sans-serif">I will afterward
request an Area Resolution for having the technical corrigendum.</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Kind Regards,</span>
<br><span style=" font-size:10pt;font-family:sans-serif">Andrea</span>
<br>
<br>
<br>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">-------------</span>
<div><span style=" font-size:12pt;font-family:Times New Roman">This Recommended
Standard covers functions in both the Synchronization and Channel Coding
Sublayer and the Physical Layer<i>, the latter for what concerns the modulation
schemes. CCSDS 401.0-B [5] covers additional features of the Physical Layer
like frequency bands, polarizations, etc. that are not described or referenced
here.</i></span>
<br>
<br>
<br><span style=" font-size:8pt;color:#808080;font-family:Verdana"><b>HE
Space Operations for ESA - European Space Agency</b></span>
<br><span style=" font-size:8pt;color:#00a1e0;font-family:Verdana"><b>Ph.D.
Andrea Modenini</b></span><span style=" font-size:8pt;color:#808080;font-family:Verdana"><b><br>
Communication Systems & Technologies Engineer</b></span><span style=" font-size:12pt;font-family:Tms Rmn"><b>
</b></span><span style=" font-size:8pt;color:#808080;font-family:Verdana"><br>
TT&C and PDT Systems & Techniques Section (TEC-EST)<br>
RF Systems Division<b><br>
ESTEC</b><br>
Keplerlaan 1, PO Box 299<br>
NL-2200 AG Noordwijk, The Netherlands</span><span style=" font-size:8pt;color:blue;font-family:Verdana"><u><br>
</u></span><span style=" font-size:8pt;color:#808080;font-family:Verdana">andrea.modenini@esa.int
| </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 53439</span>
<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">Andrea
Modenini/estec/ESA</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style=" font-size:9pt;font-family:sans-serif">"Space
Link Coding & Synchronization Working Group" <sls-cc@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">10-06-21
17:28</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-CC]
VCM technical corrigendum wording (AI_21_01)</span>
<br>
<hr noshade>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Dear colleagues,</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">please find enclosed
the proposed changes by Jon to the VCM BB discussed during the joint C&S/RFM
meeting. Please send your comments before <b>1st July 2021</b> (if
any) directly to John with CC Enrico and I, and C&S mailing list.</span>
<br>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Regards</span>
<br><span style=" font-size:10pt;font-family:sans-serif">Andrea</span>
<br>
<br>
<br><span style=" font-size:8pt;color:#808080;font-family:Verdana"><b>HE
Space Operations for ESA - European Space Agency</b></span>
<br><span style=" font-size:8pt;color:#00a1e0;font-family:Verdana"><b>Ph.D.
Andrea Modenini</b></span><span style=" font-size:8pt;color:#808080;font-family:Verdana"><b><br>
Communication Systems & Technologies Engineer</b></span><span style=" font-size:12pt;font-family:Tms Rmn"><b>
</b></span><span style=" font-size:8pt;color:#808080;font-family:Verdana"><br>
TT&C and PDT Systems & Techniques Section (TEC-EST)<br>
RF Systems Division<b><br>
ESTEC</b><br>
Keplerlaan 1, PO Box 299<br>
NL-2200 AG Noordwijk, The Netherlands</span><span style=" font-size:8pt;color:blue;font-family:Verdana"><u><br>
</u></span><span style=" font-size:8pt;color:#808080;font-family:Verdana">andrea.modenini@esa.int
| </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 53439</span>
<br><span style=" font-size:9pt;color:#800080;font-family:sans-serif">-----
Forwarded by Andrea Modenini/estec/ESA on 10-06-21 17:25 -----</span>
<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" <Jon.Hamkins@jpl.caltech.edu></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style=" font-size:9pt;font-family:sans-serif">"Andrea
Modenini (external)" <Andrea.Modenini@esa.int>, "Enrico.Vassallo@esa.int"
<Enrico.Vassallo@esa.int></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style=" font-size:9pt;font-family:sans-serif">09-06-21
18:48</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style=" font-size:9pt;font-family:sans-serif">VCM
technical corrigendum wording (AI_21_01)</span>
<br>
<hr noshade>
<br>
<br>
<br><span style=" font-size:12pt">Andrea, Enrico,</span>
<br><span style=" font-size:12pt">Attached is a draft VCM technical corrigendum
in response to AI_21_01 from the C&S WG. I completed this in consultation
with Ken Andrews and John Pietras.</span>
<br><span style=" font-size:12pt">The main changes are in two places: Section
3.2.3 and Section 3.3.2.3 to 3.3.2.4. In summary, with the new wording
the randomization is determined by VCM type:</span>
<ul>
<li><span style=" font-size:12pt">Type 1 (SCCC-like) VCM will randomize
the Transfer Frames as the SCCC standard does, using the TM randomizer.</span>
<li><span style=" font-size:12pt">Type 2 (DVB-S2-like) VCM will randomize
the sliced encoder-inputs as the DVB-S2 standard does, using the ETSI DVB-S2
baseband scrambler.</span></ul><span style=" font-size:12pt">This will make
the CCSDS VCM standard consistent with the 131.2-B-1 and 131.3-B-1 books
(SCCC and DVB-S2), with respect to randomization.</span>
<br><span style=" font-size:12pt">These changes are not related to randomization
that occurs after encoding. The VCM protocol standard already applies post-encoding
randomization, at the physical layer.</span>
<br><span style=" font-size:12pt">Can you forward this message to the RFM
and C&S mailing lists along with your guidance on how/when to respond
with comments? I believe we agreed to resolve this action by email.</span>
<br><span style=" font-size:12pt"> ----Jon</span>
<br><span style=" font-size:12pt">-- <b><br>
Jon Hamkins</b><br>
Chief Technologist, Communications, Tracking, and Radar Division<b><br>
O</b> 818-354-4764 (preferred) | <b>M</b> 626-658-6220 (does
not work at home)<br>
<b><br>
JPL</b> | jpl.nasa.gov [attachment "2021-05-27-VCM-431.1-technical-corrigendum-post-discussion-v3.doc"
deleted by Andrea Modenini/estec/ESA] </span>
<br>
<br>
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