DF of Noise generators (jammers) , in particular anti-drone, anti-mobile jammers?

Hi Kraken, thanks a lot for achieving a really professional approach and sharing huge work with the people.
The question is:

  1. Does it matter if a jammer has chaotic/special phase modulation and/or white noise spectrum distribution - will the KrakenSDR find such jammer and how it will affect on detection accuracy in this case?
  2. Is the KrakenSDR mostly applicable for DF of anti-drone, anti-GPS, anti-mobile jammers?
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IIRC most common COTS drones like a DJI operate on the same ISM band as wifi - so near 2.4 and 5 GHz. Unfortunately the Kraken can’t go past 1766 MHz, or 1.7 GHz. If you want to DF a drone, you’ll probably have to use a WiFi yagi and something like an Ettus B200 or an ADALM Pluto to get your LOBs.

As for GPS, in theory you could as GPS operates under that 1766 MHz limit. I personally have never used it for this purpose, and you’d have to get five identical SMA GPS antennas.

In terms of cell phone/radio handset jammers then as long as its under that 1766 MHz limit then you could probably DF those emitters. So a jammer jamming the 850 band of GSM could be detectable, but probably not the 1800 band. Just know that any man-packable solution may have an antenna array either too big and unwieldy to transport, or too small to be highly accurate, requiring more LOBs and thus more movement.

That being said IIRC the Kraken doesn’t demodulate a signal, just finds where it’s coming from so I don’t believe modulation will be an issue. May be wrong though.

Thank you w122!
Yes I meant jammers under 1766 Mhz, those for 433-866 Mhz and GPS.
I supposed that not the kind of a usual modulation itself, but the quick intentional chaotic sharp phase “bouncing”, will hinder Kraken’s DF algorithm.
If not, it would be perfect.

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Correct. KrakenSDR does not demodulate when using the DOA application.

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The modulation doesn’t really matter. The main issue is the possible use of spread spectrum or hopping signals. If the jammer signal is hopping all over different frequency bands, the Kraken will only be able to track it when it hits an active VFO frequency set in the Kraken web gui.

A simple jammer would just be transmitting a strong blocking signal on those frequencies, so yes it would be no problem to find the jammer. If it’s some sort of more sophiscated frequency hopping jammer, it might be a bit more difficult.

Also as others mentioned, the top end frequency of the KrakenSDR is 1.766 GHz, and at frequencies above about 1 GHz you do need to be quite precise in the manufacturing and use of your antenna array and cabling.

Thank you very much)