The signal in the first and second videos is Wi-Fi - if you use a sample rate of 20M you can see it much clearer.
On 14 October 2015 at 07:28, Srinivasan T <[email protected]> wrote: > > > 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 <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 <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 > <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 > > > > _______________________________________________ > HackRF-dev mailing list > [email protected] > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev > >
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