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Subject: [Enabling Environment] Cognitive Radio Date: Friday 03 June 2005 04:24 From: [EMAIL PROTECTED] To: [EMAIL PROTECTED], [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Hello we Oftelsat are a young company, founded 4 years ago in Quito, Ecuador. Our main goal has never been getting rich in a very short time. All of our engineers are field proven development workers, combining technology to rural and urban developement. We would like to introduce a new connectivity solution: "WI-NVIS". This connectivity solution, in development, in our company, is ment to create IP-connectivity over lager distances than Wi-Fi and Wi-Max. Maximum distances will be arround 1000km. Without the use of repeater stations and/or satelites! Max throughput will be limmited to 64Kbs/128Kbs. The system will work in the shortwave band, below 30Mhz. making use of a cognitive radio design(Automatic Link Establishment), SDR, Software Defined Radio, integrating, multislotted 3Khz, data channels and high speed sequential or OFDM, modulation. We will start the first field experimentations in about 4 weeks from now, beginning of june 2005. The experiments will be held in Ecuador, between the city of Esmeraldas, Guyaquil some 350km more to the south and Quito, in the Andes mountains at 3000 meters altitude. MCCH, a cacao producers association in Ecuador has invited us to make a digital-voice and datalink using computer controled communcations, advanced modulation and NVIS propagation via the Ionosphere. (a thin highly ionised airlayer in the sky, at some altitude of 200km high. This gas layer is ionised by the radiation and partical bombardment of our SUN) First step in the experiments will be the setting up a "digital voice link", using the ARD 9800 voice/datamodem at 3Kbs, between, Esmeraldas, Guyaquil and Quito. All fixed stations. Second step in this experiment is setting up a link between a mobile, station and Guyanquil, Esmeraldas. Third step is the transmission af non ip data. Point to Point, between, Esmeraldas, Guyaquil and Quito. Fourth step is setting up a PPP link between Esmeraldas and Quito. Second fase of this step is the linking of the PPP radio link to an ASDL Internet/Intranet connection. Making transparent IP possible. Maximum throughput in this fase is only 3Kbs, but for 1 channel, 3khz., only. The later S(oftware) D(efined) R(adio) version, will generate a multiplexed, multislotted signal, throughput 64kbs and 128Kbs. This speed, combined with sofisticated data compression and store and forward should make a WI-NVIS solution feasible! Getting Rural connectivity and networking, within reach of the "poor", without the need of expensive satelite links, with the posiblity to form on request radio Intranets, gatewayed to Internet via, ASDL or satelite etc. We would be glad to recieve feedback of this new approach, from potential users all over the world, espeacialy in developing countries. We are aware that the US military and nato forces, are the only ones, working on something similar for the battlefield. No mater where! Multimedia to and from every soldier on the battlefield. We are not interested in the military development, but it would be a loss if we, from the south of the planet would not use the available science and technology within our reach. greetings and don't hesitate te ask or give an opinion. ing. Karel Fassotte HC1AHP / PE2KFA cognitive radio expert [EMAIL PROTECTED] ing. Steef Fassotte Network and computing expert [EMAIL PROTECTED] ing. Paco Olaya Implementation engineer. [EMAIL PROTECTED] -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 267.3.0 - Release Date: 30/05/2005 _______________________________________________________ Enabling Environment Working Group mailing list [EMAIL PROTECTED] http://www.unicttaskforce.org/perl/showdoc.pl?area=enab ------------------------------------------------------- -- Edward Cherlin, Simputer Evangelist Encore Technologies (S) Pte. Ltd. The Village Information Society http://cherlin.blogspot.com _______________________________________________ BAWUG's general wireless chat mailing list [unsubscribe] http://lists.bawug.org/mailman/listinfo/wireless
