Hi, I'm not a radio engineer and don't use gnuradio much but used to think about these things for hobby hacking.
Thoughts: - Recording from multiple antennas simultaneously could: - provide for separating it from the signal using a blind source separation approach - give more information on the direction of the noise - Integrating a signal pulse period to gain detail on it (like with pulsars or van eck phreaking) could reveal things, such as what it is doing if it is a powerful unshielded electronic device Incidentally, I'm quite curious how to do those two things with gnuradio. On 9/27/23, Daniel Estévez <dan...@destevez.net> wrote: > Hello, > > Taking a quick look at your recording, I see some kind of pulsed signal > that follows a regular pattern. The signal is on for a period of ~548 > usec, then off for two periods of this duration (~548 usec per period), > and then the same repeats forever (one period on, two periods off). This > doesn't look like anything that would remind me of LTE or 5G. > > A wider recording might give more clues, since, since this pulsed signal > appears to be much wider than 2.5 MHz. If you have access to an ADALM > Pluto, you could use Maia SDR (https://maia-sdr.org/) to record. This is > exactly one of the use cases I had in mind when I started the project. > > Best, > Daniel. > > On 27/09/2023 13:21, veso...@gmail.com wrote: >> >> Hello there all, I hope someone can help me >> >> I am trying to watch some television on CH47 (679.25Mhz) >> >> I am in Slovenia and I am trying to receive and watch Federalna >> Televizija transmitting from Bosnia and Herzegovina (BiH) >> >> But there is very anoying signal bothering me, you can see the problem >> here: https://youtu.be/wt4vEfu7yEI?si=XDQ8wQ-rK-lb8LMW >> >> Instead of seing PAL and hearing sound, I see this anoying lines and >> hear digital data :( >> >> So I decided to bring my Airspy R2 to visually see and record some IQ >> data on whats going on >> >> So this is what I recorded: >> https://transfer.sh/dMhDtqnodK/baseband_679250000Hz_14-23-42_26-09-2023.wav >> >> Center frequency was 679.25Mhz but sadly I was only able to record about >> 2.5Mhz of Bandwith, because my phone could not handle full 10Mhz >> >> As you can see PAL was bearly able to get through this jamming signal >> >> At first I thought it could be 600Mhz 5G NR which is sadly right where I >> want to receive (663 – 698 Uplink, 617 – 652 Downlink), but thats only >> for US, not Europe >> >> The next suspect could be 5G Extended Lower SMH (which has downlink from >> 698 – 716) but its 20Mhz above my signal, PAL only needs about 6-8Mhz so >> this should not be a problem >> >> Then I thought maybe LTE Lower SMH on 700MHz could be the culprit, which >> again doesnt make any sense (Downlink on 699 – 716Mhz) >> >> I hope something could be done >> >> At least to figure out what signal that is so I can complain to relevant >> local authorities >> >> I am there for a 3 more days, so if needed I can do more messurments >> >> Sadly I only brought Airspy HF+, and Airspy R2 with me nothing more >> capable bandwith vise >> >> I also have Samsung Galaxy S10+ if it can maybe help in messuring LTE >> signals somehow >> >> Thanks to everyone for anwsering >> -- >> Sent from myMail for Android >> > >
