From owner-freebsd-current@FreeBSD.ORG Sun Mar 6 15:11:48 2011 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 87E09106564A for ; Sun, 6 Mar 2011 15:11:48 +0000 (UTC) (envelope-from erob@gthcfoundation.org) Received: from relais.videotron.ca (relais.videotron.ca [24.201.245.36]) by mx1.freebsd.org (Postfix) with ESMTP id 5EABB8FC17 for ; Sun, 6 Mar 2011 15:11:48 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=ISO-8859-1 Received: from [192.168.0.100] ([184.162.50.38]) by VL-MR-MRZ20.ip.videotron.ca (Sun Java(tm) System Messaging Server 6.3-8.01 (built Dec 16 2008; 32bit)) with ESMTP id <0LHN004ZJ678IY00@VL-MR-MRZ20.ip.videotron.ca> for freebsd-current@freebsd.org; Sun, 06 Mar 2011 10:11:33 -0500 (EST) Message-id: <4D73A41A.4050109@gthcfoundation.org> Date: Sun, 06 Mar 2011 10:11:22 -0500 From: Etienne Robillard Organization: Green Tea Hackers Club User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.16) Gecko/20101227 Icedove/3.0.11 To: freebsd-current@freebsd.org References: <4D7398C6.8030800@gthcfoundation.org> <201103061533.32138.hselasky@c2i.net> <4D73A085.4030009@gthcfoundation.org> In-reply-to: X-Enigmail-Version: 1.0.1 Subject: Re: can somebody explains OFDM in FreeBSD? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: erob@gthcfoundation.org List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Mar 2011 15:11:48 -0000 On 06/03/11 10:01 AM, Adrian Chadd wrote: > OpenBSD has driver support for OFDM chips. Anything that speaks 11a, 11g or > 11n == OFDM. > > You'd have to speak to an RF related person about your definition of > harmful. I mean, think about it - 802.11 devices are supposed to give off > EMR that a receiver can decode. So your question about whether OFDM being > harmful requires more context, as unlike wired solutions (say wired > ethernet) which may give off EMR which could then be snooped, 802.11 is > supposed to be received through EMF. :) > > Also, that paper you referenced talks about ERLANG, it doesn't mention OFDM > anywhere. > > HTH, > > > Adrian > > Orthogonal Frequency Division Multiplexing: https://gthc.org/investigations/OFDM/72_armstrong_ofdm.pdf @Diane: I'm worried from a amateur computer scientist point-of-view about the harmfulness of EMF fields; in particular the ELF/VLF frequencies as defined in OFDM, for operating WLAN devices as 'ethernet-class subcarriers'.. Kind regards, -- Etienne Robillard Company: Green Tea Hackers Club Occupation: Software Developer (and CEO) E-mail: erob@gthcfoundation.org Work phone: 450-936-2123 Website (Company): https://gthc.org/ Website (Blog): https://gthc.org/blog/ PGP public key fingerprint: F2A9 32EA 8E7C 460F 1728 A1A7 649C 7F17 A086 DDEC During times of universal deceit, telling the truth becomes a revolutionary act. -- George Orwell If a free society cannot help the many who are poor, it cannot save the few who are rich. -- John F. Kennedy