GPS jammers hijacking trucks...read all about it

[turkeydance]

quote:

The core problem for any system using GPS is that the signals are extremely weak,
an inevitable byproduct of the vast distances those signals need to travel.
Jammers work by overpowering GPS signals by emitting a signal at the same frequency,
just a bit more powerful than the original. The typical jammers used for cargo hijackings
are able to jam frequencies from up to 5 miles away rendering GPS tracking
and security apparatuses, such as those used by trucking syndicates, totally useless.

GPS jammers are being used to hijack trucks and down drones: How to stop them

The problem of GPS jamming has spawned an array of anti-jamming solutions.

www.zdnet.com

 

[noway2]

Lots of information here: https://en.wikipedia.org/wiki/GPS_signals

BPSK signals, not likely hard to jam. Modulate a carrier on the same frequency with a little random noise and split it into the in phase and quadrature components (or these days, just generate it numerically) and transmit. GPS receivers would probably go bonkers.