Hi All,
I recently came across an application in my research where I had to extract the wireless channel information (like CSI) from the wireless card. I was amazed that manufacturers (like Intel) do not provide any software packages that extract these information. I found some tool (made by developers, http://dhalperi.github.io/linux-80211n-csitool/) that calculates these information from Intel 5300 WiFi cards, but many people reported instability in the phase measurements provided by this tool. I am sure if Intel itself provided this information from its PHY layer, measurements would be much more accurate and trustworthy. Does anybody know a reason for why the manufacturers do not provide these PHY layer information?
I know this might be a very general question but I really do need to know why getting this information is too difficult.