Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_MED,SPF_PASS, T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id uBQNbMGK021919 for ; Tue, 27 Dec 2016 00:37:24 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cLelU-0003uj-4l for rs_out_1@blacksheep.org; Mon, 26 Dec 2016 23:33:12 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cLelT-0003ua-DD for rsgb_lf_group@blacksheep.org; Mon, 26 Dec 2016 23:33:11 +0000 Received: from resqmta-ch2-06v.sys.comcast.net ([2001:558:fe21:29:69:252:207:38]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cLelQ-0005wv-4F for rsgb_lf_group@blacksheep.org; Mon, 26 Dec 2016 23:33:10 +0000 Received: from resomta-ch2-06v.sys.comcast.net ([69.252.207.102]) by resqmta-ch2-06v.sys.comcast.net with SMTP id LelFczwyQTERULelNcFPiV; Mon, 26 Dec 2016 23:33:05 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20161114; t=1482795185; bh=4nCGk0DQWN4kU/nnU0fFTxYktAOnyBweY5uz+X7ANmI=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=IkQ5bAOofVo1O/vfbUCGxvaQkgBUHRUJqb257w0aWooY6aYryLeHDi/yE2JrlhK4a wOPn7DDTKmlAubFTHagZWmro2caz/b80jTYNMcKoi2CGNjK0EkCZfcI0GCb/+SzRLO qindoC1Hz/zOAjn5pYYH7uk34udJOR9DmyzRz6YSJsbxXpdOSQqOUfmalLXYjhepkw zsAOpCF/63VyyqwN4ML3wdX0Ysdwn96/ZWQn7IMN9PjjJggHNBOls4FgjaQYgi2rm9 jQMiXsF8Z7RaPN0eGUvDQE9fAOtKrK5S9vZRdk7Hid4JnzgDcz5eWsAbnIXiUWrlUO LxyCgaryN3LyA== Received: from Owner ([IPv6:2601:141:0:bec5:1848:80fe:40d7:e8ba]) by resomta-ch2-06v.sys.comcast.net with SMTP id LelAcqNyXBjCGLelAcQQ28; Mon, 26 Dec 2016 23:33:04 +0000 From: To: References: <5860C842.90809@abelian.org> In-Reply-To: Date: Mon, 26 Dec 2016 18:32:37 -0500 Message-ID: <006201d25fd0$676934b0$363b9e10$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQJBcxK6tgFxE0cJya4aYIAFhPpCvAIpJBn+oCtxTOA= Content-Language: en-us X-CMAE-Envelope: MS4wfABau5dOHqLwjNAh4MNbdID+nSyMKtyDVNgYpGPPmNBULbiPt3S7nivlHyHA+Ue8cIx9yUM/l0SpZKcs54J2CeU7ZY7XIwjC2nYQiLVdPq8EtlId94yi vlcxDNLgvc7EuRAEPekAcJtv6Mb6WNyA3QI= X-Scan-Signature: 66d07794ca19cd68f7d6cc289cd4ac18 Subject: RE: LF: Article on forward error correction Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.75 Status: O X-Status: X-Keywords: X-UID: 9966 That's a keeper Bill. - Jim AA5BW -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Bill de Carle Sent: Monday, December 26, 2016 2:03 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Article on forward error correction There should be a "Nicholson limit" for how well something of a certain complexity can be explained using a given number of words with a high probability of being understood correctly. Your paper is about as good as it could ever get. Thanks Paul. Bill VE2IQ At 02:35 AM 12/26/2016, Paul wrote: >I wrote a non-mathematical introductory article about how forward error >correction works. > >There's a lot of material on the web about FEC but most of it is very >technical and tends to concentrate on one or another particular coding >scheme. I couldn't find anything that demonstrates and really explains >in simple terms the essential principle of it. > >So I thought I'd try to write something, perhaps to see if I can >understand it myself. > >The article should appeal to anyone who's wondered how 'coding' >a message, which increases its bandwidth and reduces its S/N, can >actually lead to greatly improved communications. > > http://abelian.org/fec/pn161218/ > >or in pdf format > > http://abelian.org/fec/pn161218.pdf > >Whether I've succeeded or not, the reader will have to judge. > >-- >Paul Nicholson >-- >