Re: [Starlink] starlink at sea

[Mike Puchol <mike@starlink.sx>]

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The uplink is an OFDM signal with 128 subcarriers, looking at the signal in the time domain reveals a frame length corresponding to 14% (from memory, 1,1 us frame vs 6.7 us pause). I have two terminals 1 meter apart and they can each achieve 30 Mbps at the same time over the same uplink channel. I would expect the satellite to assign a particular set of slots to a terminal.

If there are any OFDM blind analysis experts in the room, shout!

Best,

Mike
On Jul 14, 2022, 13:33 +0200, Sebastian Moeller <moeller0@gmx.de>, wrote:
> Hi Mike,
>
> > On Jul 14, 2022, at 13:15, Mike Puchol via Starlink <starlink@lists.bufferbloat.net> wrote:
> >
> > On the multiple terminals, I have verified that the duty cycle of a consumer terminal is 14%, thus, you could have 7 terminals on a single uplink channel with some guard time.
>
> Could you elaborate how that works.how the terminals will be interleaved in that situation?
>
> Regards
> Sebastian
>
>
> > I have seen 30 Mbps up, so you’d be able to push 210 Mbps in uplink, or a spectral efficiency of about 3.4 bps/Hz.
>

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