[Nspcsg] Mar15_CSG_wp07 GAST D Validation Table D-8B - Rev1.docx

[Susumu Saito]

Dear Tim,

Now I have checked all the values of Table D-8B
including Message CRC, FEC, inpput/output of 
bit scrambling, and D8PSK symbols.

I obtained the same values except for the two items 
pointed out by Suzuki-san.

The results is summarized in the attached document.
Should we make it into a separate working paper from 
yours?

Best regards,

Susumu Saito

> Dear Tim,
> 
> Since Linda and Saito-san have verified the Table D-8B up to CRC field,
> I have cross checked input to / output from bit scrambling, and D8PSK modulation.
> 
> As a result, I have found two disagreements with your result as shown below:
> (1) Output from bit scrambling
> A series of bits from 0x78 appeared in the second row from the bottom to
> 0x3F appeared in the last raw should be deleted.
> Looks like editorial issue.
> 
> (2) Fill bits
> As length of scrambled data is 1,729 bits, number of fill bits needed should be 2,
> instead of 1.
> 
> SSID              :    3 bits
> Transmission len. :   17 bits
> Training seq. FEC :    5 bits
> Msg. Block Header :   48 bits
> Msg. Block 1 (MT2):  344 bits
> Msg. Block 2 (MT3): 1312 bits
> ------------------------------
>             total : 1729 bits
> 
> mod(1729,3)=1 -> needs two fill bits
> 
> 
> Also, I have some editorial findings; they are shown in
> the attached document using "comment function" of Microsoft Word.
> 
> Regards,
> 
> -------------------------------------------------
> KAZUSHI Suzuki
> NEC Corporation
> ATC/NAV SYSTEM DEPARTMENT
> RADIO APPLICATION DIVISION
> Phone : +81-42-333-1590
> e-mail: k-suzuki at hq.jp.nec.com
> 
>> -----Original Message-----
>> From: Nspcsg [mailto:nspcsg-bounces at aeronav.net] On Behalf Of Susumu
>> Saito
>> Sent: Tuesday, March 24, 2015 9:51 PM
>> To: Tim Murphy
>> Cc: Matt Harris; nspcsg at aeronav.net
>> Subject: Re: [Nspcsg] Mar15_CSG_wp07 GAST D Validation Table D-8B - Rev
>> 1.docx
>> 
>> Dear Tim,
>> 
>> I have also obtained the same CRC values in the Table D8-B of
>> WP07 of Mar15 CSG virtual meeting.
>> 
>> Best regards,
>> 
>> Susumu Saito
>> 
>>> Dear Tim,
>>> 
>>> We have verified the coding of the message and the computation of the
>> CRC. That is what we can do with the tools we have. We get the same results
>> as you did for the message including the CRC.
>>> 
>>> Do we need to write a brief paper on it, or will this e-mail do?
>>> 
>>> Linda
>>> 
>>> From: Nspcsg [mailto:nspcsg-bounces at aeronav.net] On Behalf Of Murphy,
>> Tim
>>> Sent: 14. mars 2015 01:26
>>> To: 'nspcsg at aeronav.net'
>>> Cc: Harris, Matt
>>> Subject: [Nspcsg] Mar15_CSG_wp07 GAST D Validation Table D-8B - Rev
>> 1.docx
>>> 
>>> CSG members,
>>> 
>>> Attached is a revised version of WP 7 from today’s meeting.  The WP
>> has the revised version of Table D-8B with the additional change that
>> we agreed to make today, i.e. to change the GAD from “B3” to “C4”.  All
>> the CRC’s FEC’ and so forth have been recomputed.  So this should be
>> the new baseline for the validation discussed in the paper.
>>> 
>>> Baraba Clark,  Can you make sure Tin gets this paper as I don’t seem
>> to have her email address anymore.
>>> 
>>> Honeywell, Thales and Indranavia, .. please advise if you will be able
>> to cross check the computation as soon as possible.
>>> 
>>> Thanks
>>> Tim Murphy
>>> Senior Technical Fellow
>>> Boeing Commercial Airplane Group
>>> Electronic Systems
>>> (425) 965-6744 <-NEW!
>>> Cell (425) 280-6844
>>> Fax (425) 342-5812
>>> 
>>> 
>>> _______________________________________________
>>> Nspcsg mailing list
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>> 
>> 
>> 
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