[Sls-rfm] Fw: ESA proposed change to pink recommendations 2.4.22A and 2.4.22B

[Enrico.Vassallo at esa.int]

Thanks for agreeing to the ESA proposal.

Best Regards, Enrico

----- Forwarded by Enrico Vassallo/esoc/ESA on 20/02/2018 12:13 -----

From:   Enrico Vassallo/esoc/ESA
To:     sls-rfm at mailman.ccsds.org
Date:   29/01/2018 15:42
Subject:        ESA proposed change to pink recommendations 2.4.22A and 
2.4.22B


Dear All,

pink recommendations 2.4.22A and 2.4.22B were agreed at the meeting in the 
Hague. However, we agreed to submit them to agency review together with 
the new recommendations (red) 2.4.24 and 3.1.7. Apart from minimizing the 
number of polls, this decision is linked to the fact that rec 2.4.24 
addresses an alternative solution for the same case and therefore some 
parallelism is necessary.

AI_17-06 with due date 31 December 2017 was assigned to finalize 2.4.24. I 
have not received the input from Jon to date.

In ESA we received several comments on the performance for PN ranging chip 
rate to telemetry symbol rate ratios (let me call them ratios here) above 
3. As you all know and as explained in considering (m), the performance 
normally gets better for higher ratios. Notwithstanding this, the noting 
in recommends (5) was interpreted by ESA people as a NO-GO for ratios 
above 3, which is not what the noting says.
To avoid this kind of misunderstanding, Gunther has done an additional 
analysis for the ratio = 10, which as you can see gets the same results as 
ratio = 3 (see the new rev. 2 of the document SLS-RFM_17-02rev1 presented 
in the Hague) and modified recommends (5) by replacing 3 with 10 at the 
very end of this sentence (highlighted in yellow).

ESA proposes to use this version for the agency review, with the 
additional changes that may be needed once the final version of 2.4.24 is 
made available by Jon.

I am kindly ask you reply by February 12 in case you disagree with this 
almost editorial change. In case of no reply, I assume your concurrence.

Best Regards, Enrico


[attachment "PINK 2.4.22A&B (GMSK and PN RNG recs)_for_review_Jan2018.doc" 
deleted by Enrico Vassallo/esoc/ESA] [attachment "SLS-RFM_17-02 (GMSK and 
PN Ranging - improved TM demod)rev2.pdf" deleted by Enrico 
Vassallo/esoc/ESA] 

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