From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johannes Berg Subject: Re: multi-antenna handling Date: Mon, 08 Jul 2013 10:59:12 +0200 Message-ID: <1373273952.8312.7.camel@jlt4.sipsolutions.net> References: <1345481425.4459.46.camel@jlt3.sipsolutions.net> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1345481425.4459.46.camel-8upI4CBIZJIJvtFkdXX2HixXY32XiHfO@public.gmane.org> Sender: radiotap-owner-sUITvd46vNxg9hUCZPvPmw@public.gmane.org To: "radiotap-sUITvd46vNxg9hUCZPvPmw@public.gmane.org" List-Id: radiotap@radiotap.org On Mon, 2012-08-20 at 18:50 +0200, Johannes Berg wrote: > I'm planning to modify this (in Linux) to include, where available, > antenna index & per-antenna signal information by duplicating the > radiotap namespace for each antenna, so that the header would, for > example, read as follows for a 3x3 devices: > > * ... TSF, Flags, Rate, Channel, ... > * antenna signal: -40 dBm > * antenna: 0 > * ... MCS, A-MPDU status, ... > * antenna signal: -45 dBm > * antenna: 1 > * antenna signal: -43 dBm > * antenna: 2 FWIW, I've now implemented this in Linux (in mac80211), although I start a new radiotap namespace for each antenna, separate from the first one, so you'll see * any of: TSF, flags, rate, channel, MCS, a-mpdu, VHT, ... (new radiotap namespace) * ant signal: -40 dBm * anntenna: 0 (new radiotap namespace) * ant signal: -45 dBm * anntenna: 1 ... for however many antennas/chains there are. johannes