Date: Tue, 28 Aug 2012 21:03:34 -0700 From: Adrian Chadd <adrian@freebsd.org> To: "Wright, Brett" <Brett.Wright@cooperindustries.com> Cc: freebsd-wireless@freebsd.org, Kim Culhan <w8hdkim@gmail.com> Subject: Re: Atheros DFS radar detection Message-ID: <CAJ-Vmo=2Uh0q7zrWdHswEaoGyAPT7pvTaKctcwajw0Y0Qg2Nxw@mail.gmail.com> In-Reply-To: <475A4E02EFF4724A9E58F55A56AC131606692EA4@APEVS1.ap.ci.root> References: <CAKZxVQU-%2BW9AP4a9W0PGyLmBOa1GVOrGcLC8bp5zW_=K%2Bv3tHA@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160641D618@APEVS1.ap.ci.root> <CAKZxVQWeOnw_kZWzuXfHSS-ssQfGVG=ybYK%2B%2B8EaqnFVe-rLpg@mail.gmail.com> <CAJ-Vmon=NfyZW9vJRSNxTLZvJhobeCP-S1O3TxopNzArWunCCQ@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160661E6AC@APEVS1.ap.ci.root> <CAJ-VmomJZD_NBM8=N1oD1a0XCFLoXoezStXHKLKCSGLBFrKT2Q@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160661F137@APEVS1.ap.ci.root> <CAJ-Vmo=6HLXxYLG3u-oAndR66wtnSySYm5Rp7Jp5T6eyiPq7UQ@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC131606667F85@APEVS1.ap.ci.root> <CAJ-Vmo=cC3SbtgRuVyjjseLg0E9SA1UBRh5fh_j1ROxo-p6PCw@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC131606692EA4@APEVS1.ap.ci.root>
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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 <Brett.Wright@cooperindustries.com> 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
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