[SLS-CC] New draft of CCSDS 230.1-G (TC coding Green Book)

Thu Feb 27 17:01:49 UTC 2020

Dear Massimo, dear all,
 please find below my comments to the draft TC coding Green Book

Kind Regards

Green Book's Sections 2.3, 2.4, 6.1, 6.2, 6.4, 6.5, and 7.2, 7.4.2 should 
be updated/harmonised as well. These sections currently have sentences 
that are applicable to BCH case only
Table 4-2, 4-3, I suggest to add a sentence in the text that explains that 
numbers in the tables are the exponential values of the protograph parity 
matrix
Page 7, second line in the text, it is reported "shown in ," without the 
reference.
Several times the book refers to Codeword Error Rate (CER) as Word Error 
Rate (WER). This should be possibly harmonised. I spot WER in the 
following sections:
Page 8, in the text
y-Label of Figure 9-3
y-Label of Figure 9-8
Page 20, in the text
Page 9, I believe that text "Reference [2] specifies that PLOP-2 [...]" 
better fits in Section 5.5 "SELECTION OF PLOP-1 OR PLOP-2"
Figure 9-2 and 9-3: I believe we should show just results for the TC codes
Page 15, Section "Horizontal layered BP", in the text it is reported 
L(r_ji) with upperscript "I-1". I believe it should read "l-1" 
Annex F, Page 26, Example 2, it is suggested to explain that tail sequence 
is adopted only for example purposes (since there is no tail sequence for 
n=512)

HE Space Operations for ESA - European Space Agency
Ph.D. Andrea Modenini
Communication Systems & Technologies Engineer 
TT&C and PDT Systems & Techniques Section (TEC-EST)
RF Systems Division
ESTEC
Keplerlaan 1, PO Box 299
NL-2200 AG Noordwijk, The Netherlands
andrea.modenini at esa.int | www.esa.int
T +31 71 56 53439

From:   Massimo.Bertinelli at esa.int
To:     "Space Link Coding & Synchronization Working Group" 
<sls-cc at mailman.ccsds.org>
Date:   27/01/2020 09:28
Subject:        [SLS-CC] New draft of CCSDS 230.1-G (TC coding Green Book)
Sent by:        "SLS-CC" <sls-cc-bounces at mailman.ccsds.org>

Dear colleagues, 

following AI_19_19 (Darmsdtat 2019 meeting), Ken re-worked the draft TC 
coding green book, cleaning it up and modifying the order of encoding and 
randomisation (for LDPC) as agreed also for the Blue Book (further email 
coming soon). 
This draft will be used for our WG review, with the target of publishing 
the new version of the book later this year. 
Can you please provide your comments by 9 March (5 weeks)? 
Based on the comments received, I will plan a dedicated session during our 
face to face meeting in Huntsville. 

Best regards, 
Massimo 

---------------------------------------------------
Massimo Bertinelli
Communication Systems Engineer
ESA/Estec

Tel. +31 (0)71 5653435
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