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: : mailn 1480; 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 v41K6RtU003842 for ; Mon, 1 May 2017 22:06:28 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1d5HWf-0005wu-4U for rs_out_1@blacksheep.org; Mon, 01 May 2017 21:02:29 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1d5HWe-0005wl-Lv for rsgb_lf_group@blacksheep.org; Mon, 01 May 2017 21:02:28 +0100 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1d5HWb-00069I-EP for rsgb_lf_group@blacksheep.org; Mon, 01 May 2017 21:02:27 +0100 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=updxsnjY7PcEk7MTU9k0qI1gZipm+jjioatNTVtpOqE=; b=Fyhv23NiIvY7zserqoVzq8cK5m 40rtjNWCfo+AWSmDjrUCKF62DQthL+2y7UZldqGKd1hGmTA0WvL0ubkrQSacKnBIaGP73ONzyva3U XIJVPUzF++Rk/Kvgd9fq70WBrQAOXs/iTgoXBUTs8u/8ehO/uDPc1GFI/LiEoUEkLuUc=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:59853 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1d5HWb-0002P5-52 for rsgb_lf_group@blacksheep.org; Mon, 01 May 2017 21:02:25 +0100 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 8FECF400A8F for ; Mon, 1 May 2017 20:02:24 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <59078CFE.8070909@posteo.de> <1493667503.76424202@f89.i.mail.ru> From: Paul Nicholson Message-ID: <8582a1ef-e865-af6b-9be2-b7bdd7140be8@abelian.org> Date: Mon, 1 May 2017 20:02:24 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <1493667503.76424202@f89.i.mail.ru> 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: 5c335215f1b3de26d890ee84d49616ce Subject: Re: LF: Re[2]: VLF: New carrier on 6470.005 Hz 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: RO X-Status: X-Keywords: X-UID: 11552 Stefan wrote: > I will repeat the test in a few days on 6470.1 Hz. Perhaps you would like to try the next software revision of EbNaut. Decoder version 0.7 and encoder version 0.5 at http://abelian.org/ebnaut/software_ms.shtml There is some testing that I haven't finished but it is fit to use for normal message lengths. This version has CRC down to 0 bits, and will do up to 1000 chars (although you need a terrible amount of RAM to decode such long messages). The actual CRC size to use is not critical, just keep to less than about 8 bits for 3 chars and less than about 6 bits for 2 chars. Increasing the CRC reduces the gain of the inner (convolutional) stage but increases the gain of the outer (list decoder) stage. The overall performance is about the same but the shorter CRC means a shorter list and slightly quicker decode. Also the shorter CRC leads to slightly longer symbols for a given Eb/N0, so less critical symbol timing. -- Paul Nicholson --