From: Simon Wunderlich <sw@simonwunderlich.de>
To: Sven Eckelmann <sven@narfation.org>
Cc: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>,
"Giori, Kathy" <kgiori@qca.qualcomm.com>,
linux-wireless <linux-wireless@vger.kernel.org>,
Michal Kazior <michal.kazior@tieto.com>,
"ath10k@lists.infradead.org" <ath10k@lists.infradead.org>
Subject: Re: [RFC 0/2] ath10k spectral scan support
Date: Wed, 16 Jul 2014 10:38:09 +0200 [thread overview]
Message-ID: <201407161038.10130.sw@simonwunderlich.de> (raw)
In-Reply-To: <4111404.UJkIUxkzQm@bentobox>
> On Wednesday 16 July 2014 08:24:58 Michal Kazior wrote:
> > > * So far, we always get 64 bins of fft data in the samples, even if we
> > >
> > > are in HT40 or VHT80 mode. That doesn't seem right, as there should
> > > be more bins for wider channels (e.g. 128 or 256 bins). Is there any
> > > parameter to change in the configuration to get the output from
> > > multiple channels / higher bandwidth?
> >
> > Hmm.. I suspect this may be because you use scan command. Scanning
> > uses channel list which is programmed with legacy modes a and g
> > (implying 20Mhz). Perhaps that's the limiting factor now. Using other
> > (wider) modes breaks scan from what I remember but it might be worth
> > checking out if it impacts fft bin sizes.
>
> I did the HT80 and HT40 stuff on a single channel in the spectral
> "background" mode. They reports from the firmware (10.1) still only had 64
> bins. The HT80 stuff wasn't tested with the "main" firmware because it
> refused to switch to HT80 mode as AP/Sta.
Just to clarify this a little more, we tried AP (running hostapd) as well a
STA in 40 and 80 MHz modes. We always got 64 bins returned.
Cheers,
Simon
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next prev parent reply other threads:[~2014-07-16 8:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-15 16:32 [RFC 0/2] ath10k spectral scan support Simon Wunderlich
2014-07-15 16:32 ` [RFC 1/2] ath: Move spectral debugfs structs to shared header Simon Wunderlich
2014-07-15 16:32 ` [RFC 2/2] ath10k: add spectral scan feature Simon Wunderlich
2014-07-16 9:30 ` Michal Kazior
2014-07-16 14:35 ` Sven Eckelmann
2014-07-17 5:34 ` Michal Kazior
2014-07-16 6:24 ` [RFC 0/2] ath10k spectral scan support Michal Kazior
2014-07-16 8:25 ` Sven Eckelmann
2014-07-16 8:38 ` Simon Wunderlich [this message]
2014-07-16 8:56 ` Michal Kazior
2014-07-18 10:26 ` Janusz Dziedzic
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