how can i get pure OFDM graph

[funnygiraffe]

I'm currently doing a project on wifi-base distance meassurement. I found this paper : https://www.usenix.org/system/files/con ... asisht.pdf.
however, it's require to gain pure signal for later process. I'm curious how i can get this form esp32 , and can it's be done on arduino-ide.

and Does change in the radio channel corresponding to the change in wifi-sub freq.

[ESP_Sprite]

I don't think Arduino has specific calls for this, but given that Arduino uses a recent enough esp-idf release, you can use esp_wifi_set_csi_rx_cb to grab the CSI data.

A change in channels essentially changes the OFDM base frequency and as such also the absolute values of the subfrequencies.

[funnygiraffe]

Can you give us an example of its usage . I'm newbie on this field

[jonathanmuller]

There are more details on the structure there : https://docs.espressif.com/projects/esp ... nformation
See example code there : https://github.com/espressif/esp-idf/issues/2012
Or there : https://github.com/jonathanmuller/ESP32 ... ation-CSI-