Return-Path: Received: (qmail 16176 invoked from network); 12 Apr 2005 16:53:14 -0000 Received: from unknown (HELO ptb-spamcore03.plus.net) (192.168.71.7) by ptb-mailstore03.plus.net with SMTP; 12 Apr 2005 16:53:14 -0000 Received: from Debian-exim by ptb-spamcore03.plus.net with spam-scanned (Exim 4.44) id 1DLOdV-0008N5-QT for dave@picks.force9.co.uk; Tue, 12 Apr 2005 17:53:13 +0100 Received: from [192.168.67.2] (helo=ptb-mxcore02.plus.net) by ptb-spamcore03.plus.net with esmtp (Exim 4.44) id 1DLOdV-0008N1-Og for dave@picks.force9.co.uk; Tue, 12 Apr 2005 17:53:13 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1DLOdV-000GkB-MT for dave@picks.force9.co.uk; Tue, 12 Apr 2005 16:53:13 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1DLOdM-0003PS-MN for rs_out_1@blacksheep.org; Tue, 12 Apr 2005 17:53:04 +0100 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1DLOdM-0003PJ-AW for rsgb_lf_group@blacksheep.org; Tue, 12 Apr 2005 17:53:04 +0100 Received: from cmsout03.mbox.net ([165.212.64.33]) by relay.thorcom.net with esmtp (Exim 4.43) id 1DLOdK-0003wc-IB for rsgb_lf_group@blacksheep.org; Tue, 12 Apr 2005 17:53:04 +0100 Received: from cmsout03.mbox.net (cmsout03.mbox.net [165.212.64.33]) by cmsout03.mbox.net (Postfix) with ESMTP id 90025125 for ; Tue, 12 Apr 2005 16:52:54 +0000 (GMT) Received: from uadvg129.cms.usa.net [165.212.11.129] by cmsout03.mbox.net via smtad (C8.MAIN.3.21U); Tue, 12 Apr 2005 16:52:54 GMT X-USANET-Source: 165.212.11.129 IN dibene@usa.net uadvg129.cms.usa.net X-USANET-MsgId: XID730JDLq136450X03 Received: from [192.168.0.2] [151.46.42.220] by uadvg129.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.21E) with ESMTP id 365JDLq110024M29; Tue, 12 Apr 2005 16:52:53 GMT X-USANET-Auth: 151.46.42.220 AUTH dibene@usa.net [192.168.0.2] Message-ID: <425BFCE8.9010004@usa.net> Date: Tue, 12 Apr 2005 18:52:56 +0200 From: Alberto di Bene User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <000701c53f43$2e3dd4d0$5f4136d2@mcalevey> <5.1.0.14.0.20050412154826.02288930@u0019445.kuleuven.be> In-Reply-To: <5.1.0.14.0.20050412154826.02288930@u0019445.kuleuven.be> X-Enigmail-Version: 0.90.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Z-USANET-MsgId: XID365JDLq120024X29 X-SPF-Result: relay.thorcom.net: 165.212.64.33 is neither permitted nor denied by domain of usa.net X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=failed,none Subject: Re: LF: G3AQC in ZL Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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-Spam-Filtered: by PlusNet SpamCORE (v4.00) > "TX/RX synchronisation" would reduce the time occupied by FFT by 100 > or more (from several FFT/sec to 1 FFT/min). The "calculation power" > that becomes available could be used to improve SNR. But How ? Maybe, if the Tx and Rx can be brought into phase coherence (what about ionospheric effects ?) then the FFT could be replaced by techniques working in the time domain, like correlation and Wiener or matched filtering... maybe someone more expert than me on the subject would comment. 73 Alberto I2PHD