Return-Path: Received: (qmail 20904 invoked from network); 20 Mar 2001 13:06:49 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 20 Mar 2001 13:06:49 -0000 Received: (qmail 13973 invoked from network); 20 Mar 2001 13:06:46 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 20 Mar 2001 13:06:46 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14fLhi-0001v0-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 20 Mar 2001 12:57:38 +0000 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14fLhh-0001uv-00 for rsgb_lf_group@blacksheep.org; Tue, 20 Mar 2001 12:57:37 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id NAA00315; Tue, 20 Mar 2001 13:00:01 GMT Received: (qmail 20507 invoked from network); 20 Mar 2001 13:48:34 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 20 Mar 2001 13:48:34 -0000 Received: by gauntlet.mail.dera.gov.uk; id NAA21679; Tue, 20 Mar 2001 13:35:23 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma021564; Tue, 20 Mar 01 13:34:46 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Tue, 20 Mar 2001 13:01:54 +0000 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Tue, 20 Mar 2001 12:56:16 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F9C03E5@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: "LF Group \(E-mail\)" Subject: LF: WOLF - am I missing something ? Date: Tue, 20 Mar 2001 12:56:16 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/html; charset=windows-1252 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit

I've just been reading throught the documentation for Wolf and it all seems rather over complicated for an enhanced BPSK system - having to loop-play .WAV files through some kind of audio-RF interface. Isn't there a way of using the VE2IQ interface(s) for Wolf ? At one stroke this would remove all need for Soundcard and serial port data rates to be measured and calibration procedures.

Reading the description it appears to be a 10b/s BPSK convolutionally encoded bitstream with FEC added. This surely lends itself to soft descision decoding which presumably is how the software works. But that is all software, the samples are in exactly the same form as used by Bill's system ?

We all have to accept that doing any sort of accurate timing operation on a PC is futile - whether Soundacard, serial port or, even worse, by software timing. Therefore some sort of external interface really should be used to resynchronise Tx and Rx data samples.

Andy G4JNT





-- 

The Information contained in this E-Mail and any subsequent correspondence

is private and is intended solely for the intended recipient(s).

For those other than the recipient any disclosure, copying, distribution, 

or any action taken or omitted to be taken in reliance on such information is

prohibited and may be unlawful.