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=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 mailn.lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id uBCBwjT6009065 for ; Mon, 12 Dec 2016 12:58:47 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cGPCY-0006eN-RQ for rs_out_1@blacksheep.org; Mon, 12 Dec 2016 11:55:26 +0000 Received: from [195.171.43.34] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cGPCY-0006eE-0U for rsgb_lf_group@blacksheep.org; Mon, 12 Dec 2016 11:55:26 +0000 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay2.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cGPCV-0001wA-B6 for rsgb_lf_group@blacksheep.org; Mon, 12 Dec 2016 11:55:24 +0000 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=igkz5Tx8eUce9BPHa2W2Br+7estrNlMOD0dIuTiGCHE=; b=26mgpJmgpP5zSr91zUfIBY1ObE hu0NYvP6uX8MfJ5zj706fsOcR+B5ekvitgAR3TL0jZ0Fszp9cz574zgDZL3MZTBDn67gzMpp1TfJa JF8IsIFTIQm2cDxc4h729JTceqkUumSn4AP4tLY/q0RGVVLqiftEA0F1iNJ/kZ0LsgA8=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:58401 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cGPCU-0003mr-Gj for rsgb_lf_group@blacksheep.org; Mon, 12 Dec 2016 11:55:22 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id DE2F5400373 for ; Mon, 12 Dec 2016 11:55:21 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <158f2c8291d-6251-9748@webprd-m41.mail.aol.com> From: Paul Nicholson Message-ID: <584E9029.3040108@abelian.org> Date: Mon, 12 Dec 2016 11:55:21 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 In-Reply-To: <158f2c8291d-6251-9748@webprd-m41.mail.aol.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org X-Scan-Signature: 0a4643e586472c13187d293ec5d096c2 Subject: Re: LF: VO1NA received my EbNaut Content-Type: text/plain; charset=utf-8; format=flowed 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: 9779 Well done with this - a great result and close to the limit. A distance of 4555km. > 12110608_result.png > 12110608_sym.png Always fascinating to see a message decoded from a signal that is quite invisible. No trace of the squared carrier or any sign of an axis to the symbol plot, so impossible to extract a reference phase. This is a good use of EbNaut - it needed both list decoding and a full reference phase search. S/N was about -48dB in audio bandwidth. I don't know if any other mode could have got a message through. There is probably some other signal within the bandwidth of the wav file, hence the -4dB Eb/N0 estimate from the carrier S/N. Usually the carrier derived Eb/N0 is more accurate than the Eb/N0 estimated from the BER, but not so when the input file contains other signals. -- Paul Nicholson --