From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from bifrost.lang.hm (mail.lang.hm [64.81.33.126]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id D499B21F5F0 for ; Wed, 17 Dec 2014 14:49:40 -0800 (PST) Received: from asgard.lang.hm (asgard.lang.hm [10.0.0.100]) by bifrost.lang.hm (8.13.4/8.13.4/Debian-3) with ESMTP id sBHMncSV006359; Wed, 17 Dec 2014 14:49:38 -0800 Date: Wed, 17 Dec 2014 14:49:38 -0800 (PST) From: David Lang X-X-Sender: dlang@asgard.lang.hm To: Valdis.Kletnieks@vt.edu In-Reply-To: <15610.1418851812@turing-police.cc.vt.edu> Message-ID: References: <15610.1418851812@turing-police.cc.vt.edu> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Cc: cerowrt-devel@lists.bufferbloat.net Subject: Re: [Cerowrt-devel] Fwd: Announcing New airFiber24HD X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Dec 2014 22:50:09 -0000 >> *15.9 bps/Hz* Spectral Efficiency. > If they're using phase encoding or similar, that's pushing the ragged edge I think. Won't take much dip in the S/N before that comes back to bite you on the tookus, They support many encoding schemes, and will use all channels in each direction. As conditions degrade, the speed will slow. The top speed is using 1024-QAM modulation, it will then fall back to 256-QAM (which is the top that 802.11ac will use), and then to 64-QAM (which is the top of 802.11n) This has far more in common with old fashioned microwave links than Wi-Fi David Lang