From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from vsmx001.dclux.xion.oxcs.net (vsmx001.dclux.xion.oxcs.net [185.74.65.81]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id B0BC73B2A4 for ; Thu, 14 Jul 2022 08:03:28 -0400 (EDT) Received: from proxy-1.proxy.oxio.ns.xion.oxcs.net (proxy-1.proxy.oxio.ns.xion.oxcs.net [77.75.176.85]) by mx-out.dclux.xion.oxcs.net (Postfix) with ESMTPA id 659B38C030A; Thu, 14 Jul 2022 12:03:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=dclux.xion.oxcs.net; s=mail1; t=1657800207; bh=k4wXzhauN2tREkbntsOCxfFpLlUrtOGzCZPOH/x1Xss=; h=Date:From:To:Cc:In-Reply-To:References:Subject:From; b=k30THTLaqY0QIwook58ytYldsOB+hLoD4JzZm9sOCyXCLE8a8HbUMhJG3/VjhizqR 8hwKOTEDxCWCtwEGVtEyrZRuYWViOb0NlaG7vhmOn9kSsF4v4cTkXvEZ+Ih8HbuFAY wRU6z836U6rVWs4e4KiD5ao9Y75YFINa9Gwg5jb0kx3WzEQZ94eBVjv5kXvCZuLHZ2 5LcKIlfFwbXiIM9k1xtT6fU9MTNFN55DoFB02uXoIY8477FBfjmJPzwvczT0WoXiCu TZusyt0fPWRkng/5AXRDd0C9Qf5Bi2w3bypxQujwf+2ov1f+C6s0vmGlQ9wdPXPssj 8w3goI7w5gXWg== Date: Thu, 14 Jul 2022 14:02:55 +0200 From: Mike Puchol To: Sebastian Moeller Cc: Larry Press , David Lang , Dave Taht via Starlink Message-ID: In-Reply-To: <42D3F3C5-C1B3-48EA-8C45-2540ACD787E4@gmx.de> References: <20220713173602.0582c9b3@spidey.rellim.com> <92n4s129-6r15-7q75-7293-qpo73q298srn@ynat.uz> <841ca6dc-d6d3-46ab-87c0-d6bcaa31533b@Spark> <42D3F3C5-C1B3-48EA-8C45-2540ACD787E4@gmx.de> X-Readdle-Message-ID: e5f6ce24-b6f9-4c23-a388-2d2fe517da1b@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="62d00608_180115be_85e5" X-VadeSecure-Status: LEGIT X-VADE-STATUS: LEGIT Subject: Re: [Starlink] starlink at sea X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Jul 2022 12:03:28 -0000 --62d00608_180115be_85e5 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline The uplink is an O=46DM signal with 128 subcarriers, looking at the signa= l in the time domain reveals a frame length corresponding to 14% (from me= mory, 1,1 us frame vs 6.7 us pause). I have two terminals 1 meter apart a= nd they can each achieve 30 Mbps at the same time over the same uplink ch= annel. I would expect the satellite to assign a particular set of slots t= o a terminal. If there are any O=46DM blind analysis experts in the room, shout=21 Best, Mike On Jul 14, 2022, 13:33 +0200, Sebastian Moeller , wrot= e: > Hi Mike, > > > On Jul 14, 2022, at 13:15, Mike Puchol via Starlink wrote: > > > > On the multiple terminals, I have verified that the duty cycle of a c= onsumer terminal is 14%, thus, you could have 7 terminals on a single upl= ink channel with some guard time. > > Could you elaborate how that works.how the terminals will be interleave= d in that situation=3F > > Regards > Sebastian > > > > I have seen 30 Mbps up, so you=E2=80=99d be able to push 210 Mbps in = uplink, or a spectral efficiency of about 3.4 bps/Hz. > --62d00608_180115be_85e5 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
The uplink is an O=46DM signal with 128 subcarriers= , looking at the signal in the time domain reveals a frame length corresp= onding to 14% (from memory, 1,1 us frame vs 6.7 us pause). I have two ter= minals 1 meter apart and they can each achieve 30 Mbps at the same time o= ver the same uplink channel. I would expect the satellite to assign a par= ticular set of slots to a terminal.

If there are any O=46DM blind analysis experts in the room, shout=21

Best,

Mike
On Jul 14, 2022, 13:33 +0200, Sebas= tian Moeller <moeller0=40gmx.de>, wrote:
Hi Mike,

On Jul 14, 2022, at 13:15, Mike Puchol via = Starlink <starlink=40lists.bufferbloat.net> wrote:

On the multiple terminals, I have verified that the duty cycle of a consu= mer 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=3F

Regards
Sebastian


I have seen 30 Mbps up, so you=E2=80=99d be= able to push 210 Mbps in uplink, or a spectral efficiency of about 3.4 b= ps/Hz.

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