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

[Kazushi Suzuki]

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
> > Nspcsg at host412.hostmonster.com
> > http://host412.hostmonster.com/mailman/listinfo/nspcsg_aeronav.net
> 
> 
> 
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