TAG: CRPA

Cobham launches next-generation GPS anti-jam system at Paris Air Show

June 19, 2017By

Cobham Antenna Systems has launched its next-generation anti-jam GPS system. The system provides significant immunity to jamming compared with a conventional GPS antenna, allowing the platform to operate over 100 times closer to the jammer whilst maintaining its GPS reception, the company said. The system will be available to view on Cobham’s stand, hall 2b, stand E156, at the International Paris... read more

Anti-jam systems: Which one works for you?

June 14, 2017By

In my April column, I introduced the basic concepts behind GPS anti-jam technology, along with a bit of history around its evolution. I knew this was a popular topic, but I didn’t anticipate the enormous amount of positive correspondence I’ve received since, including many inquiries about where to buy this technology and who is entitled to have it. So this... read more

Anti-jam technology: Demystifying the CRPA

April 12, 2017By

Controlled reception pattern antennas (CRPAs, pronounced “serpers”), adaptive antennas, null-steering antennas, beamforming antennas… You’ve probably heard of at least one of those terms in any discussion around GPS anti-jam technology for defense. Because they are all terms that describe essentially the same thing: a specialized antenna that helps protect GPS receivers from interference and jamming. But what exactly are they? Where... read more

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Tracking RFI: Interference localization using a CRPA

A controlled radiation-pattern antenna can preserve GNSS positioning while providing at least an azimuth angle towards an interference source. If integrated with an attitude and heading reference system, only a few lines of position pointing towards the RFI source could provide a fast indication of the probable ground location. read more

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Expert Opinions: Testing and simulating against GNSS jamming, spoofing

November 8, 2016By

Q: What special considerations should be taken into account for testing and simulating against GNSS jamming and spoofing?   A: Current integrations of GPS include a controlled reception pattern antenna (CRPA). Testing with a standard interference or jamming source will not provide accurate results. Wavefront generator simulators are capable of outputting signals that correctly stimulate the GPS receiver’s antenna electronics.... read more

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