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 autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; 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 uBEDrB79022205 for ; Wed, 14 Dec 2016 14:53:12 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cH9wn-0002Q8-0f for rs_out_1@blacksheep.org; Wed, 14 Dec 2016 13:50:17 +0000 Received: from [195.171.43.34] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cH9wm-0002Pz-Lo for rsgb_lf_group@blacksheep.org; Wed, 14 Dec 2016 13:50:16 +0000 Received: from simone.ucs.mun.ca ([134.153.232.76]) by relay2.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.87) (envelope-from ) id 1cH9wj-0002KX-AL for rsgb_lf_group@blacksheep.org; Wed, 14 Dec 2016 13:50:15 +0000 Received: from plato.ucs.mun.ca (plato.ucs.mun.ca [134.153.232.153]) by simone.ucs.mun.ca (8.13.8/8.13.8) with ESMTP id uBEDo8Sx028725 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 14 Dec 2016 10:20:08 -0330 Date: Wed, 14 Dec 2016 10:20:11 -0330 (NST) From: jcraig@mun.ca X-X-Sender: jcraig@plato.ucs.mun.ca To: rsgb_lf_group@blacksheep.org In-Reply-To: <584E9029.3040108@abelian.org> Message-ID: References: <158f2c8291d-6251-9748@webprd-m41.mail.aol.com> <584E9029.3040108@abelian.org> MIME-Version: 1.0 X-Scan-Signature: 1708620d3ce65bee0beaaede7929769a Subject: Re: LF: VO1NA received my EbNaut Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed 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: 9794 Thank-you Paul, Wolf and Markus for your sotware advice and assistance. I have rsNTP running on the pc and the SR calibrated at 12k. The next step is setting up SL frequency offset detector to compensate for the RX (FT-817) drift. Should rsNTP be left running in the background while SL is tasked with EbNaut and would it be OK to calibrate at a higher SR for future experiments on VLF (8.277 kHz)? On Mon, 12 Dec 2016, Paul Nicholson wrote: > > 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 > -- > >