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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Enrico,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> 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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Victor<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Sls-rfm [mailto:sls-rfm-bounces@mailman.ccsds.org]
<b>On Behalf Of </b>Enrico.Vassallo@esa.int<br>
<b>Sent:</b> Thursday, June 16, 2016 5:41 AM<br>
<b>To:</b> Fong, Wai H. (GSFC-5670) <wai.h.fong@nasa.gov><br>
<b>Cc:</b> sls-rfm@mailman.ccsds.org; Marco.Lanucara@esa.int<br>
<b>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<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Dear Wai,</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">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.</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Here's my compromise proposal. Have a look at it and let me know if it could be OK for you.</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">1) MB-01</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">I partly agree and partly disagree with you.
</span><br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Disagreement:</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Also 16-32-64APSK are defined for the first time in this recommendation and not in other parts of 401.
</span><br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Agreement:</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">It is true that pi/2-BPSK symbols for the frame headers are only defined and studied so far for the two standards mentioned.
</span><br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Compromise:</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">New recommends (6):</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Courier New"">“</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif">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”</span>
<o:p></o:p></p>
<p><span style="font-size:10.0pt;font-family:"Arial",sans-serif">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
</span><span style="font-family:"Calibri",sans-serif">CCSDS 131.2-B-1 and CCSDS 131.2-B-1</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> and that for systems compliant with
</span><span style="font-family:"Calibri",sans-serif">CCSDS 131.0-B-2</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"> further work is needed.</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">We then add the task to the charter.</span>
<br>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">2) SM-01</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Here I also partly agree and partly disagree with you.
</span><br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Disagreement:</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">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</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Agreement:</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">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.</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Compromise:</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">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.</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Therefore, keeping a factor 10 margin in our pockets, I would propose to re-write recommends (7)
</span><br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">from</span> <o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt">(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;</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">to</span> <o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt">(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></span>
<br>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Would you be able to accept this compromise? The ESA colleagues originating the RIDs are OK.</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Regards, Enrico</span>
<br>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:purple">----- Forwarded by Enrico Vassallo/esoc/ESA on 16/06/2016 11:17 -----</span>
<br>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">From: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">Enrico Vassallo/esoc/ESA</span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">To: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"Fong, Wai H. (GSFC-5670)" <<a href="mailto:wai.h.fong@nasa.gov">wai.h.fong@nasa.gov</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Cc: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"<a href="mailto:Marco.Lanucara@esa.int">Marco.Lanucara@esa.int</a>" <<a href="mailto:Marco.Lanucara@esa.int">Marco.Lanucara@esa.int</a>>,
"<a href="mailto:Salvador.Marti@esa.int">Salvador.Marti@esa.int</a>" <<a href="mailto:Salvador.Marti@esa.int">Salvador.Marti@esa.int</a>>, "<a href="mailto:sls-rfm@mailman.ccsds.org">sls-rfm@mailman.ccsds.org</a>" <<a href="mailto:sls-rfm@mailman.ccsds.org">sls-rfm@mailman.ccsds.org</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Date: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">20/05/2016 08:48</span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Subject: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">Re: [Sls-rfm] CCSDS Review of CCSDS 401.0-P-25.1, Radio Frequency and Modulation SystemsPart 1: Earth
Stations and Spacecraft</span> <o:p></o:p></p>
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<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Wai,</span> <br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">your position is noted.</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">I will open discussion after June 10 waiting for other WG members' comments.</span>
<br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Regards, Enrico</span>
<br>
<br>
<br>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">From: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"Fong, Wai H. (GSFC-5670)" <<a href="mailto:wai.h.fong@nasa.gov">wai.h.fong@nasa.gov</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">To: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"<a href="mailto:Enrico.Vassallo@esa.int">Enrico.Vassallo@esa.int</a>" <<a href="mailto:Enrico.Vassallo@esa.int">Enrico.Vassallo@esa.int</a>>,
"<a href="mailto:sls-rfm@mailman.ccsds.org">sls-rfm@mailman.ccsds.org</a>" <<a href="mailto:sls-rfm@mailman.ccsds.org">sls-rfm@mailman.ccsds.org</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Cc: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">"<a href="mailto:Marco.Lanucara@esa.int">Marco.Lanucara@esa.int</a>" <<a href="mailto:Marco.Lanucara@esa.int">Marco.Lanucara@esa.int</a>>,
"<a href="mailto:Salvador.Marti@esa.int">Salvador.Marti@esa.int</a>" <<a href="mailto:Salvador.Marti@esa.int">Salvador.Marti@esa.int</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Date: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">19/05/2016 20:22</span>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Subject: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">Re: [Sls-rfm] CCSDS Review of CCSDS 401.0-P-25.1, Radio Frequency and Modulation SystemsPart 1: Earth
Stations and Spacecraft</span> <o:p></o:p></p>
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<br>
<span style="font-size:10.0pt;font-family:"Calibri",sans-serif">Enrico,</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"Calibri",sans-serif">My comments are:</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">1. </span><span style="font-family:"Calibri",sans-serif">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.</span> <br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">2. </span>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, <br>
<span style="font-size:10.0pt;font-family:"Calibri",sans-serif"> </span> <br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Wai Fong, Ph.D.</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Communications Engineer</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Flight Microwave and Telecommunications Systems Branch</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">NASA Goddard Space Flight Center</span>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Code 567</span> <br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Greenbelt, MD 20771</span>
<o:p></o:p></p>
<p style="margin-bottom:12.0pt"><br>
<br>
<b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">From: </span></b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><</span><a href="mailto:sls-rfm-bounces@mailman.ccsds.org"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">sls-rfm-bounces@mailman.ccsds.org</span></a><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">>
on behalf of Enrico Vassallo <</span><a href="mailto:Enrico.Vassallo@esa.int"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">Enrico.Vassallo@esa.int</span></a><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">><b><br>
Date: </b>Thursday, May 19, 2016 at 9:49 AM<b><br>
To: </b>"</span><a href="mailto:sls-rfm@mailman.ccsds.org"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">sls-rfm@mailman.ccsds.org</span></a><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">" <</span><a href="mailto:sls-rfm@mailman.ccsds.org"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">sls-rfm@mailman.ccsds.org</span></a><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">><b><br>
Cc: </b>"</span><a href="mailto:Marco.Lanucara@esa.int"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">Marco.Lanucara@esa.int</span></a><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">" <</span><a href="mailto:Marco.Lanucara@esa.int"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">Marco.Lanucara@esa.int</span></a><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">>,
"</span><a href="mailto:Salvador.Marti@esa.int"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">Salvador.Marti@esa.int</span></a><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">" <</span><a href="mailto:Salvador.Marti@esa.int"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">Salvador.Marti@esa.int</span></a><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">><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
</span><br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Dear All,</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
this is to inform you of the outcome of the above review.</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
CNES, DLR, INPE and JAXA concurred with the pink sheets.</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
ESA and EUM generated 3 RIDs each. They are attached for your review.</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
My proposal is:</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
1) ESA-MB-01 </span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><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.</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Disposition: ACCEPTED</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
2) ESA-ML-01 </span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Makes the recommendation ECSS compatible (specifications cannot be in footnotes).</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Disposition: ACCEPTED</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
3) ESA-SM-01</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><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)).</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Disposition: ACCEPTED</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
4) EUM-XE-001</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Editorial clarification.</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Disposition: ACCEPTED</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
5) EUM-XE-002</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Editorial.</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Disposition: ACCEPTED</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
6) EUM-XE-003</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Almost editorial. In the ESA implementation, pilots are used also for lower order modulations but the suggestion of this RID is reasonable.</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Disposition: ACCEPTED</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
<br>
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><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.
</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><br>
Regards, Enrico</span><span style="font-size:10.0pt;font-family:"Calibri",sans-serif">
<br>
<br>
<br>
</span><br>
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