Atheros_CSI_tool_OpenWRT_src
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xieyaxiongfly
Unstable CSI amplitude
I use TP-LINK wdr4300 as AP and client which are equipped 3 antennas(although they can only use 2 antennas ) to measure CSI.
I fixed both the position of AP and client and measured CSI amplitude at three different time for testing the temporal stability.
I have make sure that there is no object changing when I was sending data.
There is the result which have 500 samples in each condition :
It looks unreasonable. what may cause this problem? Did anyone meet this problem before?
No, this is totally reasonable.
Please take a look at this slides. http://www.cs.princeton.edu/~yaxiongx/doc/CSI_compare.pptx
On Thu, Aug 30, 2018 at 7:29 AM hanstseng123 [email protected] wrote:
I use TP-LINK wdr4300 as AP and client which are equipped 3 antennas(although they can only use 2 antennas ) to measure CSI. I fixed both the position of AP and client and measured CSI amplitude at three different time for testing the temporal stability. I have make sure that there is no object changing when I was sending data. There is the result which have 500 samples in each condition : [image: image] https://user-images.githubusercontent.com/37927874/44848484-7f3cfb00-ac89-11e8-8e08-0a660559f9be.png
It looks unreasonable. what may cause this problem? Did anyone meet this problem before?
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@hanstseng123 Hi, could you please tell me how did you normalize the CSI matrix data? Or you just use the extracted data to measure CSI amplitude?
@hanstseng123 Hi, could you please tell me how did you normalize the CSI matrix data? Or you just use the extracted data to measure CSI amplitude?
I transform the CSI amplitude with matlab command db( ).
No, this is totally reasonable. Please take a look at this slides. http://www.cs.princeton.edu/~yaxiongx/doc/CSI_compare.pptx
@xieyaxiongfly Hi, I also observed the unstable amplitudes. I found the link to the slides is no longer valid, I am wondering where I can find them now and I intend to use them as a reference. Tks!
No, this is totally reasonable. Please take a look at this slides. http://www.cs.princeton.edu/~yaxiongx/doc/CSI_compare.pptx
@xieyaxiongfly Hi, I also observed the unstable amplitudes. I found the link to the slides is no longer valid, I am wondering where I can find them now and I intend to use them as a reference. Tks!
Hello, if you managed to find those slides, could you send me a link? I am observing similar unstable amplitudes.
Help me, @bigtreeyanger or @xieyaxiongfly , you're my only hope.
Hi @chili6f, sorry I haven't found the slides, and my observations are similar to yours.
