[Starlink] Signal Structure of the Starlink Ku-Band Downlink

[Hesham ElBakoury]

Professor Todd mentions that Elon had a tweet about it last Oct.  But I
have not seen it.

Hesham

Hesham

On Fri, Jun 23, 2023, 9:50 AM contact at olegkutkov.me <contact at olegkutkov.me>
wrote:

>
> No reaction from SpaceX or Elon
>
> On 23 Jun 2023, at 19:15, Hesham ElBakoury via Starlink <
> starlink at lists.bufferbloat.net> wrote:
>
> 
> What was Elon Musk reaction to this research?
>
> Hesham
>
> On Fri, Jun 23, 2023, 9:12 AM David Fernández via Starlink <
> starlink at lists.bufferbloat.net> wrote:
>
>> I think that paper has already been discussed in this list. It
>> appeared in the news a while ago:
>> https://www.theregister.com/2022/10/24/starlink_signal_decoded_for_use
>>
>> Regards,
>>
>> David
>>
>> > Date: Fri, 23 Jun 2023 06:17:08 -0700
>> > From: Joe Hamelin <nethead at gmail.com>
>> > To: Hesham ElBakoury <helbakoury at gmail.com>
>> > Cc: starlink at lists.bufferbloat.net
>> > Subject: Re: [Starlink] Signal Structure of the Starlink Ku-Band
>> >       Downlink
>> > Message-ID:
>> >       <CAO0-hXar-KaB=p=
>> HGeGe39vAKTeG5RHBxSgioccOj+R4Nt7yeA at mail.gmail.com>
>> > Content-Type: text/plain; charset="utf-8"
>> >
>> > Most interesting:
>> >
>> > " VIII. CONCLUSIONS We have developed and applied a blind signal
>> > identification technique to uncover the frequency- and time-domain
>> > structure of the Starlink Ku-band downlink signal. We further identified
>> > four synchronization sequences that can be used to *passively exploit*
>> > Starlink signals for pseudorange-based positioning, navigation, and
>> timing
>> > (PNT), and explicitly evaluated two of these. The results in this paper
>> > illuminate the *path to use of Starlink signals as a backup to
>> traditional
>> > GNSS* for PNT."
>> >
>> > On Fri, Jun 23, 2023 at 6:09 AM Joe Hamelin <nethead at gmail.com> wrote:
>> >
>> >>
>> >>
>> https://radionavlab.ae.utexas.edu/wp-content/uploads/2023/01/starlink_structure.pdf
>> >>
>> >> Here's the PDF.
>> >>
>> >> On Fri, Jun 23, 2023 at 2:55 AM Hesham ElBakoury via Starlink <
>> >> starlink at lists.bufferbloat.net> wrote:
>> >>
>> >>> Has anyone looked at this paper (Signal Structure of the Starlink
>> >>> Ku-Band Downlink) by Todd E. Humphreys ? This paper will be published
>> in
>> >>> IEEE Transactions on Aerospace and Electronic Systems. Are there other
>> >>> research efforts which try to do the same?
>> >>>
>> >>> Thanks
>> >>>
>> >>> Hesham
>> >>>
>> >>>
>> >>> _______________________________________________
>> >>> Starlink mailing list
>> >>> Starlink at lists.bufferbloat.net
>> >>> https://lists.bufferbloat.net/listinfo/starlink
>> >>>
>> >>
>> >>
>> >> --
>> >> --
>> >> Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474
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