Spread spectrum signal jamming (ideas)
First off, spread spectrum (frequency hopping) signal jamming is difficult if you hop on "pseudo-random" frequencies... that is, the frequencies are generated pseudo-randomly -- most likely via a special cryptographic random number generator.
They would use a shared private key between both transceivers. This is most likely used by military-grade radios.
However, they could be limited by the number of channels available for use, i.e. hardware or software.
For example, with Wi-Fi there's only 14 channels available for the 802.11b/g standard. So if you jam all 14 channels, you've essentially blocked all the possible frequency hopping that could be done.
So if you log all incoming frequencies using a spectrum analyser (or an SDR with a FFT) you can see which frequencies are being used by the hopping algorithm. From there, you can determine whether there's a fixed number of channels (so they're cycling through them) or there's an infinite number of channels (pseudo-random generated via an SDR for example).
If it's the latter, another approach must be taken.
Breaking the pseudo-random number generator, or reverse engineering it.
Utilising neural-networks capabilities in being excellent pattern recognition classifiers, we can attempt to reverse engineer the PRNG / frequency hopping algorithm.
Ultimately, one could employ a wide-band jammer -- for example, a microwave oven generates 2.4ghz, and can be used to disrupt Wi-Fi (802.11b/g) because it's very noisy and disturbs the entire band that 802.11b/g is on.
Anyway, to summarize, these are the ideas:
- Fixed channel frequency hopping:
- Log all frequencies and then jam them
- PRNG based SDR frequency hopping:
- Use NN to analyse and jam accordingly
- Alternatively, deploy wide-band jammer on frequency band that it uses
