my best bet is that VLF/ELF frequencies are using FFT (Fast Fourier Transform) algorithm to increase compression ratio of WLAN devices operating with OFDM-enabled hardware. If that is true then not all WLAN devices can do OFDM thus explaining why you could use 802.11g without it...
-------- Original Message -------- Return-Path: <abi...@abitos.org> X-Original-To: e...@gthcfoundation.org Delivered-To: e...@gthcfoundation.org Received: from mail-fx0-f42.google.com (mail-fx0-f42.google.com [209.85.161.42]) by gthcfoundation.org (Postfix) with ESMTP id 7F93B9C488 for <e...@gthcfoundation.org>; Sun, 6 Mar 2011 15:33:37 +0000 (UTC) Received: by fxm20 with SMTP id 20so3451200fxm.29 for <e...@gthcfoundation.org>; Sun, 06 Mar 2011 07:33:26 -0800 (PST) Received: by 10.223.106.1 with SMTP id v1mr3580291fao.21.1299425606490; Sun, 06 Mar 2011 07:33:26 -0800 (PST) Received: from [192.168.4.20] (pD9FCB6B4.dip.t-dialin.net [217.252.182.180]) by mx.google.com with ESMTPS id 5sm545591fak.47.2011.03.06.07.33.24 (version=SSLv3 cipher=OTHER); Sun, 06 Mar 2011 07:33:25 -0800 (PST) Message-ID: <4d73a943.90...@abitos.org> Date: Sun, 06 Mar 2011 16:33:23 +0100 From: Tobias Blersch <abi...@abitos.org> User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101207 Lightning/1.0b2 Thunderbird/3.1.7 MIME-Version: 1.0 To: e...@gthcfoundation.org Subject: Re: can somebody explains OFDM in FreeBSD? References: <4d7398c6.8030...@gthcfoundation.org> <201103061533.32138.hsela...@c2i.net> <4d73a085.4030...@gthcfoundation.org> <20110306151548.gb29...@night.db.net> <4d73a74a.7040...@gthcfoundation.org> In-Reply-To: <4d73a74a.7040...@gthcfoundation.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi, your post mentioned ELF/VLF radiation, thats electromagnetic waves the frequency range below 30kHz. How should a modulation scheme (OFDM) used in the 2.4/5GHz range be related to radiation in such a low frequency band? Tobias _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
