From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikolay Makarov Date: Sun, 10 Mar 2013 13:43:57 +0400 Subject: [ath9k-devel] CSI support In-Reply-To: References: Message-ID: <-2097551306151576445@unknownmsgid> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org Thank you very much Adrian. I would appreciate your help. ? ?????????, ??????? ??????? +7 (926) 284 80 81 On 10.03.2013, at 10:21, Adrian Chadd wrote: > On 8 March 2013 23:16, Nikolay Makarov wrote: >> Sorry. My bad. >> >> The CSI (channel state information) is similar to RSSI which describes the >> power of received signal. But unlike RSSI, CSI is energy over multiple >> subcarriers. In 802.11 g/n, there are 64 subcarriers. So CSI is a vector >> with 64 elements, each is a complex value. At the physical layer of wifi, >> they will do channel estimation, CSI is the channel estimation results for >> every subcarrier. > > Oh, right. Yes. I think there's a way to get the CSI out of the hardware. > I don't know any ETA for that though; sorry. > > I'll poke some people to see if I can get some documentation about how > to get CSI values and how to interpret them. > > Thanks, > > > > Adrian