From owner-freebsd-wireless@FreeBSD.ORG Wed Aug 29 04:03:35 2012 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 563FA106566B for ; Wed, 29 Aug 2012 04:03:35 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-pb0-f54.google.com (mail-pb0-f54.google.com [209.85.160.54]) by mx1.freebsd.org (Postfix) with ESMTP id 1FCFB8FC19 for ; Wed, 29 Aug 2012 04:03:35 +0000 (UTC) Received: by pbbrp2 with SMTP id rp2so380453pbb.13 for ; Tue, 28 Aug 2012 21:03:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=FAcAstMzA28I/ZFC3QVrlBW71CISTB68JQSG5AWxQqU=; b=OI0l9mgbsfI5ySVAZ8o8zB+/ufTaekpwdA98nt9CoqbVKPQRH3VfSnlCs4rtgelvYi rYzt925qndLrx5wHeo2psUW0QpZ0E/XgRLz0bF7+S8i3J7HI0heFqH8G7n09MIKsi7WZ MpG4ztBT8vJD42DNkVPr17/aHFEQfL89gdjJtqOskDafhQX2FLTX+Iq35aDfcVk8G6MA 1os9uOgIGV33xjrxIaMhl+rarYblUbHyii14BLG+5Z1Svk99FWvJjxZFD2geT1Txg+mY hgAttU06CnuPwieWVy+g4nT/cfIHeuZomhR+bVgLMw+tOaeIjG74xeT7Va6uVp3TYD9F p3Wg== MIME-Version: 1.0 Received: by 10.66.78.73 with SMTP id z9mr682330paw.9.1346213014854; Tue, 28 Aug 2012 21:03:34 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.68.36.106 with HTTP; Tue, 28 Aug 2012 21:03:34 -0700 (PDT) In-Reply-To: <475A4E02EFF4724A9E58F55A56AC131606692EA4@APEVS1.ap.ci.root> References: <475A4E02EFF4724A9E58F55A56AC13160641D618@APEVS1.ap.ci.root> <475A4E02EFF4724A9E58F55A56AC13160661E6AC@APEVS1.ap.ci.root> <475A4E02EFF4724A9E58F55A56AC13160661F137@APEVS1.ap.ci.root> <475A4E02EFF4724A9E58F55A56AC131606667F85@APEVS1.ap.ci.root> <475A4E02EFF4724A9E58F55A56AC131606692EA4@APEVS1.ap.ci.root> Date: Tue, 28 Aug 2012 21:03:34 -0700 X-Google-Sender-Auth: Lx8jv06lfyt2L7UwHExQabLVxuo Message-ID: From: Adrian Chadd To: "Wright, Brett" Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-wireless@freebsd.org, Kim Culhan Subject: Re: Atheros DFS radar detection X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Aug 2012 04:03:35 -0000 Hi, Just as a reference, I've committed the strong signal diversity twiddle to -HEAD as well as AR5413 radar parameter support (in case you come across one of those.) That completes my (current) round of help with this, at least until I get back from my trip. Of course, it'd be really great if someone signed up for working on a BSD licenced radar pattern detector.. :) Adrian On 26 August 2012 22:14, Wright, Brett wrote: > Hi Adrian, > >> -----Original Message----- >> From: adrian.chadd@gmail.com [mailto:adrian.chadd@gmail.com] On Behalf >> Of Adrian Chadd >> Sent: Saturday, 25 August 2012 3:52 AM >> >> I haven't yet sat down and done actual radar pulse train detection >> with the AR5212 and I know it's just going to plain suck at doing >> chirps in a busy environment (as they just look like long pulses; >> there's no FFT data to assist the software in decoding what's going >> on) but it should be enough to get you started. >> > That might be half my problem, the radar patterns I have to setup to get > compliant detection increase the chance of false radar train detection > (in combination with the false pulse detection). Reducing this false > pulse detection has been the biggest help. If I tinker too much with the > radar patterns I can't get compliant detection. > >> Have you tried these NICs on different hardware? I wonder if you're >> seeing some kind of spur or board noise that's contributing to both >> the false detections and the high noise floor calibration value. I >> don't have an SR-5 here to test against I'm afraid.. >> > > I haven't tried other hardware because I'm working on an existing > hardware platform where I have to use SR5 (mainly for the high Tx power > etc). But makes sense that the SR5 is making this whole process more > difficult... > > Thanks for all the help. > Brett