Return-path: Received: from mail-pz0-f46.google.com ([209.85.210.46]:60638 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754382Ab2EPSfa convert rfc822-to-8bit (ORCPT ); Wed, 16 May 2012 14:35:30 -0400 Received: by dady13 with SMTP id y13so1337286dad.19 for ; Wed, 16 May 2012 11:35:30 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: Date: Wed, 16 May 2012 14:35:30 -0400 Message-ID: (sfid-20120516_203541_124593_8DB365EA) Subject: Re: AR9280 reported signal strengths are flat (comparison with bcm4322 included) From: George Nychis To: Holger Schurig Cc: linux-wireless@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: BTW- is ANI _not_ applied on broadcast traffic? I notice that monitoring the signal strength of beacons does not show this behavior. Maybe not applied for localization reasons? - George On Wed, May 16, 2012 at 2:32 PM, George Nychis wrote: > Hi Holger, > > Thanks a bunch for your response! ?I had read about ANI before on the > list, it would be interesting to know if this is the cause for this. > It definitely seems plausible. I will dig around the ath9k code and > see if I can narrow down this to the cause. > > > On Wed, May 16, 2012 at 2:31 PM, George Nychis wrote: >> >> Hi Holger, >> >> Thanks a bunch for your response! ?I had read about ANI before on the >> list, it would be interesting to know if this is the cause for this. ?It >> definitely seems plausible. I will dig around the ath9k code and see if I >> can narrow down this to the cause. >> >> - George >> >> >> On Wed, May 16, 2012 at 2:08 AM, Holger Schurig >> wrote: >>> >>> This is probably due to ANI (adapative noise immunity). I think ath9k >>> does too much here, in other words: it doesn't just kick in if there >>> are too strong signals there. Instead it seems to always adjust the >>> input attenuator, needed or not. >> >>