From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.lang.hm (syn-045-059-245-186.biz.spectrum.com [45.59.245.186]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 31ADF3B29D for ; Tue, 4 Jun 2024 23:17:18 -0400 (EDT) Received: from dlang-mobile (unknown [10.2.3.133]) by mail.lang.hm (Postfix) with ESMTP id EF69D1D3D7E; Tue, 4 Jun 2024 20:17:16 -0700 (PDT) Date: Tue, 4 Jun 2024 20:17:16 -0700 (PDT) From: David Lang To: Mike Puchol cc: Michael Richardson via Starlink In-Reply-To: <1011428206.2534598.1717542074644@www.openxchange.eu> Message-ID: References: <32AD770E-336E-4CF4-8B1B-8AE7353981CC@ieee.org> <9687.1717527495@obiwan.sandelman.ca> <1011428206.2534598.1717542074644@www.openxchange.eu> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Subject: Re: [Starlink] SpaceX/Starlink says it's ready for a fall satellite-to-cell service with T-Mobile 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: Wed, 05 Jun 2024 03:17:18 -0000 Mike Puchol wrote: > Something else that's much harder to implement is MIMO, as you don't get path > diversity from a satellite. AST claims they will do this by using more than > one satellite, however they haven't answered basic questions such as how will > the UE compensate the huge differences in doppler shift on top of the multiple > paths. for the starlink version, the satellite adjusts it's transmit/receive frequencies to correct for the doppler shift so that the phones don't need to. David Lang