Envelope-to: dave@picks.force9.co.uk Delivery-date: Fri, 27 May 2005 20:05:59 +0100 Received: by ptb-mxcore03.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1Dbk9e-0001FW-4L for dave@picks.force9.co.uk; Fri, 27 May 2005 20:05:59 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (PlusNet MXCore v2.00) id 1Dbk9d-0001FK-V4 for dave@picks.force9.co.uk; Fri, 27 May 2005 20:05:58 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Dbk91-0007B6-VW for rs_out_1@blacksheep.org; Fri, 27 May 2005 20:05:19 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Dbk91-0007Ax-K0 for rsgb_lf_group@blacksheep.org; Fri, 27 May 2005 20:05:19 +0100 Received: from rwcrmhc13.comcast.net ([204.127.198.39]) by relay1.thorcom.net with esmtp (Exim 4.51) id 1Dbk8y-0001CV-Pi for rsgb_lf_group@blacksheep.org; Fri, 27 May 2005 20:05:21 +0100 Received: from 204.127.197.111 (rwcrwbc15.attbi.com[204.127.197.125]) by comcast.net (rwcrmhc13) with SMTP id <2005052719050101500c414re>; Fri, 27 May 2005 19:05:06 +0000 Received: from [24.63.207.117] by 204.127.197.111; Fri, 27 May 2005 19:05:00 +0000 From: Warren K2ORS/WD2XGJ To: rsgb lf reflector , Frederick Raab , LWCA LF Reflector Date: Fri, 27 May 2005 19:05:00 +0000 Message-Id: <052720051905.16362.42976F5C0003FF7300003FEA22058861720B97010D0A020E06979D0E03@comcast.net> X-Mailer: AT&T Message Center Version 1 (Dec 17 2004) X-Authenticated-Sender: bWFyeWphbmVib3lkQGNvbWNhc3QubmV0 Subject: LF: Covert Underwater Communications 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-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Just found this on the web, the Navy funded a research project for " very low frequency (VLF) covert acoustic communications". I know that this is for acoustic, not rf waves, but the project description reads like the proposed experimental program for my Part 5 experimental license! 73 Warren http://www.nttc.edu/resources/funding/awards/dod/dod971sel/absnavy.asp DELPHI COMMUNICATION SYSTEMS 30 North Avenue Burlington, MA 01803 Phone: PI: Topic#: (617) 221-2200 Dr. John G. Proakis NAVY 97-087 Title: Covert Underwater Communications Abstract: The objective of this project is to develop adaptive channel characterization algorithms for very low frequency (VLF) covert acoustic communications between submarines and other platforms. Technical issues that are addressed are channel propagation conditions in the VLF band and channel characterization; the impact of submarine motion on the signals transmitted in this band; and determination of optimal propagation conditions. On the signal and system level, consideration is given to determining a suitable covert signaling strategy; determination and implementation of adaptive signal processing methods for use at the receiver, including system initialization and tracking aspects. -- 73 Warren K2ORS/WD2XGJ FN42hi