From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peizhao Hu Date: Fri, 16 Aug 2013 13:46:24 +1000 Subject: [ath9k-devel] CSI support In-Reply-To: <51C9BF86.4030600@mailservices.uwaterloo.ca> References: <51C9BF5E.10607@mailservices.uwaterloo.ca> <51C9BF86.4030600@mailservices.uwaterloo.ca> Message-ID: <520DA090.2060406@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org actually, how is this CSI information different from the spectral scan feature in the ar92xx chipset?? On 26/06/13 02:04, Ali Abedi wrote: > Hello everyone, > > I am also interested in accessing CSI. Please update us as soon as you > got some good news. > > Best, > Ali > > > On 13-04-02 08:18 AM, Nikolay Makarov wrote: >> Dear Andres, >> >> Adrian preliminary confirmed it is possible to get CSI out of >> hardware. He helped me to send an internal request to Atheros to >> assist on the issue. We sent the request 30 of March. >> >> I am not clear what to do next and I am waiting directions from >> Adrian at the moment. >> >> I think that it might be helpful to send to Atheros another request >> from you. >> >> Best regards, >> Nikolay Makarov >> >> >> On Tue, Apr 2, 2013 at 1:52 PM, Andr?s Garc?a Saavedra >> > wrote: >> >> Hi Adrian, Nikolay, >> >> any luck on this line? I am also interested in obtained CSI >> information from hw for research purposes. >> >> Thanks! >> Andr?s >> >> >> On Sun, Mar 10, 2013 at 10:43 AM, Nikolay Makarov >> > wrote: >> >> 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 >> _______________________________________________ >> ath9k-devel mailing list >> ath9k-devel at lists.ath9k.org >> https://lists.ath9k.org/mailman/listinfo/ath9k-devel >> >> >> >> >> >> -- >> ? ?????????, >> ??????? ??????? >> +7 926 284 80 81 >> >> >> _______________________________________________ >> ath9k-devel mailing list >> ath9k-devel at lists.ath9k.org >> https://lists.ath9k.org/mailman/listinfo/ath9k-devel > > > > > > > _______________________________________________ > ath9k-devel mailing list > ath9k-devel at lists.ath9k.org > https://lists.ath9k.org/mailman/listinfo/ath9k-devel -- Regards; Peizhao -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20130816/1fffc773/attachment-0001.htm