<font size=2 face="sans-serif">Victor and Wai,</font>
<br>
<br><font size=2 face="sans-serif">are you ready to accept my compromise
or to further discuss it? I would like to try and close this review in
the next days so that I can send all the needed documentation to the Secretariat
by next Friday.</font>
<br>
<br><font size=2 face="sans-serif">Please advise, Enrico</font>
<br>
<br>
<br>
<br><font size=1 color=#5f5f5f face="sans-serif">From:
</font><font size=1 face="sans-serif">"Sank, Victor
J. (GSFC-567.0)[AS and D, Inc.]" <victor.j.sank@nasa.gov></font>
<br><font size=1 color=#5f5f5f face="sans-serif">To:
</font><font size=1 face="sans-serif">"Enrico.Vassallo@esa.int"
<Enrico.Vassallo@esa.int>, "Fong, Wai H. (GSFC-5670)" <wai.h.fong@nasa.gov></font>
<br><font size=1 color=#5f5f5f face="sans-serif">Cc:
</font><font size=1 face="sans-serif">"sls-rfm@mailman.ccsds.org"
<sls-rfm@mailman.ccsds.org>, "Marco.Lanucara@esa.int" <Marco.Lanucara@esa.int></font>
<br><font size=1 color=#5f5f5f face="sans-serif">Date:
</font><font size=1 face="sans-serif">16/06/2016 14:40</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Subject:
</font><font size=1 face="sans-serif">RE: [Sls-rfm]
Fw: CCSDS Review of CCSDS 401.0-P-25.1, Radio Frequency and Modulation
SystemsPart 1: Earth Stations and Spacecraft - new proposal</font>
<br>
<hr noshade>
<br>
<br>
<br><font size=2 color=#004080 face="Calibri">Enrico,</font>
<br><font size=2 color=#004080 face="Calibri">
I just want to state that I was in agreement
with Wai but was negligent in not sending an email. We will discuss
your compromise suggestion.</font>
<br><font size=2 color=#004080 face="Calibri">Thanks,</font>
<br><font size=2 color=#004080 face="Calibri">Victor</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 face="Calibri"><b>From:</b> Sls-rfm [</font><a href="mailto:sls-rfm-bounces@mailman.ccsds.org"><font size=2 face="Calibri">mailto:sls-rfm-bounces@mailman.ccsds.org</font></a><font size=2 face="Calibri">]
<b>On Behalf Of </b>Enrico.Vassallo@esa.int<b><br>
Sent:</b> Thursday, June 16, 2016 5:41 AM<b><br>
To:</b> Fong, Wai H. (GSFC-5670) <wai.h.fong@nasa.gov><b><br>
Cc:</b> sls-rfm@mailman.ccsds.org; Marco.Lanucara@esa.int<b><br>
Subject:</b> [Sls-rfm] Fw: CCSDS Review of CCSDS 401.0-P-25.1, Radio Frequency
and Modulation SystemsPart 1: Earth Stations and Spacecraft - new proposal</font>
<br><font size=3 face="Times New Roman"> </font>
<br><font size=2 face="Arial">Dear Wai,</font><font size=3 face="Times New Roman">
<br>
</font><font size=2 face="Arial"><br>
nobody else submitted any comments to my first proposal so we are down
to two RIDs where the two of us have a different view.</font><font size=3 face="Times New Roman">
</font><font size=2 face="Arial"><br>
Here's my compromise proposal. Have a look at it and let me know if it
could be OK for you.</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
1) MB-01</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
I partly agree and partly disagree with you. </font><font size=3 face="Times New Roman"><br>
</font><font size=2 face="Arial"><br>
Disagreement:</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
Also 16-32-64APSK are defined for the first time in this recommendation
and not in other parts of 401. </font><font size=3 face="Times New Roman"><br>
</font><font size=2 face="Arial"><br>
Agreement:</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
It is true that pi/2-BPSK symbols for the frame headers are only defined
and studied so far for the two standards mentioned. </font><font size=3 face="Times New Roman"><br>
</font><font size=2 face="Arial"><br>
Compromise:</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
New recommends (6):</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Courier New"><br>
“</font><font size=2 face="Arial">that the use of a frame header (see
A1.5) and of QPSK pilot symbols should be used to improve the acquisition
and tracking performance”</font><font size=3 face="Times New Roman"> </font>
<p><font size=2 face="Arial">The new section A1.5 should be as in the RID
but with an initial line saying that the spec is only for systems compliant
with </font><font size=3 face="Calibri">CCSDS 131.2-B-1 and CCSDS 131.2-B-1</font><font size=2 face="Arial">
and that for systems compliant with </font><font size=3 face="Calibri">CCSDS
131.0-B-2</font><font size=2 face="Arial"> further work is needed.</font><font size=3 face="Times New Roman">
<br>
</font><font size=2 face="Arial"><br>
We then add the task to the charter.</font><font size=3 face="Times New Roman">
<br>
<br>
</font><font size=2 face="Arial"><br>
2) SM-01</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
Here I also partly agree and partly disagree with you. </font><font size=3 face="Times New Roman"><br>
</font><font size=2 face="Arial"><br>
Disagreement:</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
Recommends (7) limits the phase noise mask to channel symbol rates equal
to or above 10 Ms/s. Therefore, using the typical 10^-4 for 2BL/Rs one
gets 1000 Hz, which is already larger than the 100 Hz proposed by the RID</font><font size=3 face="Times New Roman">
<br>
</font><font size=2 face="Arial"><br>
Agreement:</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
The recommendation does not prevent somebody from using 64-APSK at 100
ks/s. In that case, one would not know which phase noise mask to use.</font><font size=3 face="Times New Roman">
<br>
</font><font size=2 face="Arial"><br>
Compromise:</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
I would do as we did for another issue in the ECSS standard, linking the
lower integration limit to the mission specific symbol rate and PLL bandwidth.</font><font size=3 face="Times New Roman">
<br>
</font><font size=2 face="Arial"><br>
Therefore, keeping a factor 10 margin in our pockets, I would propose to
re-write recommends (7) </font><font size=3 face="Times New Roman"><br>
</font><font size=2 face="Arial"><br>
from</font><font size=3 face="Times New Roman"> </font>
<br><font size=2 face="Times New Roman">(7) that
the phase noise of the communication chain should be limited according
to the mask given in figure 2.4.23-1 for channel symbol rates equal or
above 10 Ms/s;</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
to</font><font size=3 face="Times New Roman"> </font>
<br><font size=2 face="Times New Roman">(7) that
the phase noise of the communication chain should be limited according
to the mask given in figure 2.4.23-1 for channel symbol rates equal or
above 10 Ms/s <u>for which the lower mask limit shall be 100 Hz; that the
same mask should be used for channel symbol rates below 10 Ms/s by setting
the lower validity limit in accordance with the mission channel symbol
rate and PLL loop bandwidth.</u></font><font size=3 face="Times New Roman">
<br>
<br>
</font><font size=2 face="Arial"><br>
Would you be able to accept this compromise? The ESA colleagues originating
the RIDs are OK.</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Arial"><br>
Regards, Enrico</font><font size=3 face="Times New Roman"> <br>
</font><font size=1 color=#800080 face="Arial"><br>
----- Forwarded by Enrico Vassallo/esoc/ESA on 16/06/2016 11:17 -----</font><font size=3 face="Times New Roman">
<br>
</font><font size=1 color=#5f5f5f face="Arial"><br>
From: </font><font size=1 face="Arial">Enrico
Vassallo/esoc/ESA</font><font size=3 face="Times New Roman"> </font><font size=1 color=#5f5f5f face="Arial"><br>
To: </font><font size=1 face="Arial">"Fong,
Wai H. (GSFC-5670)" <</font><a href=mailto:wai.h.fong@nasa.gov><font size=1 color=blue face="Arial"><u>wai.h.fong@nasa.gov</u></font></a><font size=1 face="Arial">></font><font size=3 face="Times New Roman">
</font><font size=1 color=#5f5f5f face="Arial"><br>
Cc: </font><font size=1 face="Arial">"</font><a href=mailto:Marco.Lanucara@esa.int><font size=1 color=blue face="Arial"><u>Marco.Lanucara@esa.int</u></font></a><font size=1 face="Arial">"
<</font><a href=mailto:Marco.Lanucara@esa.int><font size=1 color=blue face="Arial"><u>Marco.Lanucara@esa.int</u></font></a><font size=1 face="Arial">>,
"</font><a href=mailto:Salvador.Marti@esa.int><font size=1 color=blue face="Arial"><u>Salvador.Marti@esa.int</u></font></a><font size=1 face="Arial">"
<</font><a href=mailto:Salvador.Marti@esa.int><font size=1 color=blue face="Arial"><u>Salvador.Marti@esa.int</u></font></a><font size=1 face="Arial">>,
"</font><a href="mailto:sls-rfm@mailman.ccsds.org"><font size=1 color=blue face="Arial"><u>sls-rfm@mailman.ccsds.org</u></font></a><font size=1 face="Arial">"
<</font><a href="mailto:sls-rfm@mailman.ccsds.org"><font size=1 color=blue face="Arial"><u>sls-rfm@mailman.ccsds.org</u></font></a><font size=1 face="Arial">></font><font size=3 face="Times New Roman">
</font><font size=1 color=#5f5f5f face="Arial"><br>
Date: </font><font size=1 face="Arial">20/05/2016
08:48</font><font size=3 face="Times New Roman"> </font><font size=1 color=#5f5f5f face="Arial"><br>
Subject: </font><font size=1 face="Arial">Re:
[Sls-rfm] CCSDS Review of CCSDS 401.0-P-25.1, Radio Frequency and Modulation
SystemsPart 1: Earth Stations and Spacecraft</font><font size=3 face="Times New Roman">
</font>
<div align=center>
<hr noshade></div>
<br><font size=3 face="Times New Roman"><br>
</font><font size=2 face="Arial"><br>
Wai,</font><font size=3 face="Times New Roman"> </font><font size=2 face="Arial"><br>
your position is noted.</font><font size=3 face="Times New Roman"> </font><font size=2 face="Arial"><br>
I will open discussion after June 10 waiting for other WG members' comments.</font><font size=3 face="Times New Roman">
<br>
</font><font size=2 face="Arial"><br>
Regards, Enrico</font><font size=3 face="Times New Roman"> <br>
<br>
<br>
</font><font size=1 color=#5f5f5f face="Arial"><br>
From: </font><font size=1 face="Arial">"Fong,
Wai H. (GSFC-5670)" <</font><a href=mailto:wai.h.fong@nasa.gov><font size=1 color=blue face="Arial"><u>wai.h.fong@nasa.gov</u></font></a><font size=1 face="Arial">></font><font size=3 face="Times New Roman">
</font><font size=1 color=#5f5f5f face="Arial"><br>
To: </font><font size=1 face="Arial">"</font><a href=mailto:Enrico.Vassallo@esa.int><font size=1 color=blue face="Arial"><u>Enrico.Vassallo@esa.int</u></font></a><font size=1 face="Arial">"
<</font><a href=mailto:Enrico.Vassallo@esa.int><font size=1 color=blue face="Arial"><u>Enrico.Vassallo@esa.int</u></font></a><font size=1 face="Arial">>,
"</font><a href="mailto:sls-rfm@mailman.ccsds.org"><font size=1 color=blue face="Arial"><u>sls-rfm@mailman.ccsds.org</u></font></a><font size=1 face="Arial">"
<</font><a href="mailto:sls-rfm@mailman.ccsds.org"><font size=1 color=blue face="Arial"><u>sls-rfm@mailman.ccsds.org</u></font></a><font size=1 face="Arial">></font><font size=3 face="Times New Roman">
</font><font size=1 color=#5f5f5f face="Arial"><br>
Cc: </font><font size=1 face="Arial">"</font><a href=mailto:Marco.Lanucara@esa.int><font size=1 color=blue face="Arial"><u>Marco.Lanucara@esa.int</u></font></a><font size=1 face="Arial">"
<</font><a href=mailto:Marco.Lanucara@esa.int><font size=1 color=blue face="Arial"><u>Marco.Lanucara@esa.int</u></font></a><font size=1 face="Arial">>,
"</font><a href=mailto:Salvador.Marti@esa.int><font size=1 color=blue face="Arial"><u>Salvador.Marti@esa.int</u></font></a><font size=1 face="Arial">"
<</font><a href=mailto:Salvador.Marti@esa.int><font size=1 color=blue face="Arial"><u>Salvador.Marti@esa.int</u></font></a><font size=1 face="Arial">></font><font size=3 face="Times New Roman">
</font><font size=1 color=#5f5f5f face="Arial"><br>
Date: </font><font size=1 face="Arial">19/05/2016
20:22</font><font size=3 face="Times New Roman"> </font><font size=1 color=#5f5f5f face="Arial"><br>
Subject: </font><font size=1 face="Arial">Re:
[Sls-rfm] CCSDS Review of CCSDS 401.0-P-25.1, Radio Frequency and Modulation
SystemsPart 1: Earth Stations and Spacecraft</font><font size=3 face="Times New Roman">
</font>
<div align=center>
<hr noshade></div>
<br><font size=3 face="Times New Roman"><br>
<br>
</font><font size=2 face="Calibri"><br>
Enrico,</font><font size=3 face="Times New Roman"> <br>
</font><font size=2 face="Calibri"><br>
My comments are:</font><font size=3 face="Times New Roman"> </font><font size=2 face="Arial"><br>
1. </font><font size=3 face="Calibri">ESA-MB-01:
The addition of proposed text to specify pi/2-BPSK symbols is inconsistent
with the rest of the text that recommends only QPSK, OQPSK, 8PSK, 16APSK,
32APSK, or 64APSK, modulations. In addition, since pi/2-BPSK only
exist in CCSDS 131.2-B-1 and CCSDS 131.2-B-1 and not in 401.0-B, it has
not been studied formally as a modulation technique where we would need
evaluate the modulation and demodulation complexities. I would reject
this RID.</font><font size=3 face="Times New Roman"> </font><font size=2 face="Arial"><br>
2. </font><font size=3 face="Times New Roman">ESA-SM-01:
The inclusion of 10Hz-100Hz specification of the phase noise mask is necessary
because there is no lower bound on symbol rate of the recommendation. Recommends
(2) in fact specifies QPSK, OQPSK, or 8PSK modulations below 10 Ms/s where
there could be significant AWGN noise power. Missions trying to operate
with very narrow of loop bandwidths to mitigate AWGN noise need to know
that they could increase phase noise. I would reject this RID as
well. <br>
The rest I agree with. <br>
<br>
Regards, </font><font size=2 face="Calibri"><br>
</font><font size=3 face="Times New Roman"> </font><font size=2 face="Arial"><br>
Wai Fong, Ph.D.</font><font size=3 face="Times New Roman"> </font><font size=2 face="Arial"><br>
Communications Engineer</font><font size=3 face="Times New Roman"> </font><font size=2 face="Arial"><br>
Flight Microwave and Telecommunications Systems Branch</font><font size=3 face="Times New Roman">
</font><font size=2 face="Arial"><br>
NASA Goddard Space Flight Center</font><font size=3 face="Times New Roman">
</font><font size=2 face="Arial"><br>
Code 567</font><font size=3 face="Times New Roman"> </font><font size=2 face="Arial"><br>
Greenbelt, MD 20771</font><font size=3 face="Times New Roman"> </font>
<p><font size=3 face="Times New Roman"><br>
</font><font size=2 face="Calibri"><b><br>
From: </b><</font><a href="mailto:sls-rfm-bounces@mailman.ccsds.org"><font size=2 color=blue face="Calibri"><u>sls-rfm-bounces@mailman.ccsds.org</u></font></a><font size=2 face="Calibri">>
on behalf of Enrico Vassallo <</font><a href=mailto:Enrico.Vassallo@esa.int><font size=2 color=blue face="Calibri"><u>Enrico.Vassallo@esa.int</u></font></a><font size=2 face="Calibri">><b><br>
Date: </b>Thursday, May 19, 2016 at 9:49 AM<b><br>
To: </b>"</font><a href="mailto:sls-rfm@mailman.ccsds.org"><font size=2 color=blue face="Calibri"><u>sls-rfm@mailman.ccsds.org</u></font></a><font size=2 face="Calibri">"
<</font><a href="mailto:sls-rfm@mailman.ccsds.org"><font size=2 color=blue face="Calibri"><u>sls-rfm@mailman.ccsds.org</u></font></a><font size=2 face="Calibri">><b><br>
Cc: </b>"</font><a href=mailto:Marco.Lanucara@esa.int><font size=2 color=blue face="Calibri"><u>Marco.Lanucara@esa.int</u></font></a><font size=2 face="Calibri">"
<</font><a href=mailto:Marco.Lanucara@esa.int><font size=2 color=blue face="Calibri"><u>Marco.Lanucara@esa.int</u></font></a><font size=2 face="Calibri">>,
"</font><a href=mailto:Salvador.Marti@esa.int><font size=2 color=blue face="Calibri"><u>Salvador.Marti@esa.int</u></font></a><font size=2 face="Calibri">"
<</font><a href=mailto:Salvador.Marti@esa.int><font size=2 color=blue face="Calibri"><u>Salvador.Marti@esa.int</u></font></a><font size=2 face="Calibri">><b><br>
Subject: </b>[Sls-rfm] CCSDS Review of CCSDS 401.0-P-25.1, Radio Frequency
and Modulation SystemsPart 1: Earth Stations and Spacecraft </font><font size=3 face="Times New Roman"><br>
</font><font size=2 face="Arial"><br>
Dear All,</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
this is to inform you of the outcome of the above review.<br>
<br>
CNES, DLR, INPE and JAXA concurred with the pink sheets.<br>
<br>
ESA and EUM generated 3 RIDs each. They are attached for your review.<br>
<br>
My proposal is:</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
1) ESA-MB-01 <br>
<br>
We were initially thinking of adding Pi/2-BPSK symbols definition as an
additional recommendation in 401. However, it makes more sense to have
it inside recommendation 2.4.23 that becomes self standing.<br>
<br>
Disposition: ACCEPTED</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
2) ESA-ML-01 <br>
<br>
Makes the recommendation ECSS compatible (specifications cannot be in footnotes).<br>
<br>
Disposition: ACCEPTED</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
3) ESA-SM-01</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
The phase noise between 10 and 100 Hz is not important for this kind of
missions with at least 10 Ms/s (even for 1 Ms/s that is behind recommends
(2)).<br>
<br>
Disposition: ACCEPTED</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
4) EUM-XE-001</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
Editorial clarification.</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
Disposition: ACCEPTED</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
5) EUM-XE-002</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
Editorial.</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
Disposition: ACCEPTED</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
6) EUM-XE-003</font><font size=2 face="Calibri"> </font><font size=2 face="Arial"><br>
<br>
Almost editorial. In the ESA implementation, pilots are used also for lower
order modulations but the suggestion of this RID is reasonable.<br>
<br>
Disposition: ACCEPTED</font><font size=2 face="Calibri"> <br>
<br>
</font><font size=2 face="Arial"><br>
<br>
If I do not hear from you <b><u>by June 10</u></b>, I will assume that
the WG concurs with my proposed disposition and will send disposed RIDs
and final version of the recommendation to the CCSDS management for approval.
<br>
<br>
Regards, Enrico</font><font size=2 face="Calibri"> <br>
<br>
</font><font size=3 face="Times New Roman"><br>
</font><font size=2 face="Calibri"><br>
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