Return-Path: Received: (qmail 29626 invoked from network); 2 Apr 2001 15:54:21 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 2 Apr 2001 15:54:21 -0000 Received: (qmail 26425 invoked from network); 2 Apr 2001 15:54:15 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 2 Apr 2001 15:54:15 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14k6Uk-0000Q4-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 02 Apr 2001 16:43:54 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from [213.2.16.106] (helo=rsgb.org.uk) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14k6Ui-0000Pz-00 for rsgb_lf_group@blacksheep.org; Mon, 02 Apr 2001 16:43:53 +0100 Received: from miked by rsgb.org.uk with SMTP (MDaemon.v2.8.7.5.R) for ; Mon, 02 Apr 2001 16:34:21 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Mon, 2 Apr 2001 16:34:19 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: PSK Tx solution? Message-ID: <3AC8AA0B.30548.AC576A@localhost> In-reply-to: <14322.200104021330@gemini> X-Mailer: Pegasus Mail for Win32 (v3.12c) X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org X-Return-Path: miked@mail Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: M0BMU wrote: > There seems to be some potential for BPSK modulation methods > on LF, but the big difficulty is generating a TX signal with > acceptable sidebands I may be way off beam here but can we do anything with FSK? My understanding is that for voice transmissions NBFM and phase mod are differently achieved but result in roughly the same mathematics so can be demodulated as if they were identical. In the same way, can we achieve the same effect as PSK by doing something with the frequency instead? If so, linearity is not an issue. Mike, G3XDV (IO91VT) http://www.lf.thersgb.net