[ath9k-devel] Hack ath9k driver for wifi time of flight measurement

Hi All,


I am pretty new to ath9k driver. But I read a recent paper by MIT that the channel state information (CSI) of wifi can
be used for precision positioning. They used Intel 5300 wifi module which has CSI tool support. Some of the
ath9k devices, such as ar9462, ar9380 etc are also supported by an open source CSI tool. So I want to use them
to reproduce MIT's method.


I have already built a wifi CSI test system with two computers using ath9k driver. They can get the CSI readings
out fine (carrier phase). But I need to be able to control the band (2.4G, 5G) and channel of the wifi. Preferably loop
through 2.4 and 5G bands, and every channel of them. For each channel, I need to read CSI for both computer
while one is transmitting and other is listening then reverse the transmitting and listening. What is the
easiest thing to do to? 


The ath9k CSI tool can be found here:


http://pdcc.ntu.edu.sg/wands/Atheros/


MIT's cool method for accurate wifi positioning can be found here:


http://people.csail.mit.edu/deepak/Slides/NSDI2016_Chronos.pdf


Thanks in advance and Best regards,


Everett






 
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