Return-Path: Received: from rly-ma04.mx.aol.com (rly-ma04.mail.aol.com [172.20.116.48]) by air-ma07.mail.aol.com (v121_r5.5) with ESMTP id MAILINMA073-8a649a0052514d; Sat, 21 Feb 2009 08:44:27 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-ma04.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINMA048-8a649a0052514d; Sat, 21 Feb 2009 08:44:07 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Las8z-0006SK-MT for rs_out_1@blacksheep.org; Sat, 21 Feb 2009 13:43:49 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Las8z-0006SB-A4 for rsgb_lf_group@blacksheep.org; Sat, 21 Feb 2009 13:43:49 +0000 Received: from smtp3.wanadoo.co.uk ([193.252.22.156] helo=smtp3.freeserve.com) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Las8x-0005wx-0v for rsgb_lf_group@blacksheep.org; Sat, 21 Feb 2009 13:43:49 +0000 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3212.me.freeserve.com (SMTP Server) with ESMTP id 68A1B7000088 for ; Sat, 21 Feb 2009 14:43:41 +0100 (CET) Received: from AGB (unknown [91.110.64.224]) by mwinf3212.me.freeserve.com (SMTP Server) with SMTP id E67297000087 for ; Sat, 21 Feb 2009 14:43:38 +0100 (CET) X-ME-UUID: 20090221134338944.E67297000087@mwinf3212.me.freeserve.com Message-ID: From: "Graham" To: References: In-Reply-To: Date: Sat, 21 Feb 2009 13:43:28 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8050.1202 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8050.1202 X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Wanted - non-random PN sequence generator - so Off Topic it shouldn't be allowed here! Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=MISSING_OUTLOOK_NAME autolearn=no version=2.63 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-AOL-IP: 193.82.116.20 You'll have to add a bit of decision making logic that looks for the not allowed conditions ... but if its really random, as the hitch hikers guide to the galaxy tells us .. anything could happen , to quote ' MUST ALWAYS occasionally be seen' looks like 'it' has started already ... 'Don't Panic' G .. -------------------------------------------------- From: "Andy Talbot" Sent: Saturday, February 21, 2009 9:40 AM To: Subject: LF: Wanted - non-random PN sequence generator - so Off Topic it shouldn't be allowed here! > > ...but if any mathematicians, number theorists or cryptographers > should be reading this... > > I've just got a WSPR generating routine running on a PIC / AD9852 / > GPS combination, but I'm looking for a half-decent way of generating a > pseudo random Tx/Rx sequence with defined duty cycle that does not > give the long(ish) consecutive runs of 0's or 1's that MUST ALWAYS > occasionally be seen in a truly random sequence. > > In other words, the sequence needs to be bandpass filtered. > > Before I cop-out and just use a pre-generated set of lookup tables, > take a look at http://www.g4jnt.com/WSPR_PN_Sequence.pdf > for a fuller description of the mind-bender > > > Andy G4JNT > www.g4jnt.com > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.237 / Virus Database: 270.11.2/1964 - Release Date: 02/21/09 > 11:05:00 >