Return-Path: Received: (qmail 23106 invoked from network); 4 Jan 2002 04:42:21 -0000 Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by exhibition.plus.net with SMTP; 4 Jan 2002 04:42:21 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 15428 invoked from network); 4 Jan 2002 04:42:17 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys.services.quay.plus.net with SMTP; 4 Jan 2002 04:42:17 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16MM6N-0002rb-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 04 Jan 2002 04:37:07 +0000 Received: from imo-r10.mx.aol.com ([152.163.225.106]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16MM6L-0002rW-00 for rsgb_lf_group@blacksheep.org; Fri, 04 Jan 2002 04:37:06 +0000 Received: from WarmSpgs@aol.com by imo-r10.mx.aol.com (mail_out_v31_r1.9.) id l.104.ed77668 (4242) for ; Thu, 3 Jan 2002 23:36:00 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <104.ed77668.29668b30@aol.com> Date: Thu, 3 Jan 2002 23:36:00 EST Subject: Re: LF: Re: m-FSK: SNR vs bandwidth To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0 for Windows 95 sub 120 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: In a message dated 1/3/02 3:09:33 PM Eastern Standard Time, vernall@xtra.co.nz writes: << So in summary, I believe that extending LF DX achievements will be best served by developing a BPSK or DBPSK scheme. >> Interesting that we appear to be coming full-circle to what LowFERs in the States had been playing with for over a decade. Yet, what exactly are we looking at in the way of practical BPSK? Low data rates and BPSK are a very demanding combination, after all. Bit rates slower than about 1/second never really caught on here. And where could we get a clear definition of Differential BPSK, please? 73, John KD4IDY