Thanks. I can see that there is one signal interfere at 2.4 GHz.
Do you want me to capture .iq file using 20 M ? From: Mike Walters [mailto:m...@flomp.net] Sent: Wednesday, 14 October 2015 7:14 PM To: Srinivasan T Cc: hackrf-dev Subject: Re: [Hackrf-dev] Decode the Signal 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 <tsvs...@gmail.com> 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 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 _______________________________________________ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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