Dear All,
I am managed to do some RND with unknown Signal at 2.4 GHz. This Signal works
almost everywhere in Singapore, Indonesia and Malaysia.
Here some video for reference :
Here is the video :
Ø FFT at 2.4 GHz ( we can see sudden fluctuation and power in db is really
high - in Singapore at home )
https://sendvid.com/33f5hpkg
Detail : On this video, we can see peak hold in green color that leave
a trace something comes and go
Ø Spectrum Density of RF at 2.4 GHz ( in Medan - Indonesia )
http://sendvid.com/mu9m2jeg
Details : I have taken this video at place where there was no devices
that operate at 2.4 GHz ( near plantations ). We can see noise floor in blue
color comes and go.
This external interference cause Wi-Fi at 2.4 GHz to
fluctuate and sudden fluctuate at different power level will increase of SNR of
Wi-Fi ( signal to noise ratio )
Ø AirMagnet XT ( in Singapore at home )
Attached video file, file name ; https://sendvid.com/tkq3xz0s
Details : This software one of the best software available in the
market for detection interference Wi-Fi at 2.4 GHz with different options. We
can see FFT picture at real
time in leave suddenly max hold around -10 dBm. ( We
can spectrogram picture as well ). There are 2 rules to be remembered :
· If power level increase suddenly to 10 dBm then the source should be
near and visible to me but on this case we dont see the source
· Any RF Transmitter at 2.4 GHz will transmit at constant power and
sudden increase of power at middle of transmission really no possible.
Wi-Fi Fluctuations at Siloam Hospital in Medan - Indonesia
http://sendvid.com/2u2j34m7
I would like to request on how decode header information or others of the
signal. I have captured .iq and .cfile using HackRF :
https://www.dropbox.com/s/wj77dm4n7fj7rcl/Signal%20Capture.7z?dl=0
Please advise on decode the signal.
Regards
Srinivasan T
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