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GPS Anti Jamming Techniques
G-STAR Spatial Temporal Adaptive Processing
(STAP)
Lockheed Martin
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A new anti-jamming
countermeasure uses Spatial Temporal Adaptive Processing (STAP)
also known as G-STAR.
This process allows a system to remove significantly more
interfering sources than conventional systems as it discriminates
between narrowband and broadband interference. Narrowband signals
are dealt with individually while broadband signals can be
eliminated due to their uniform profile. G-STAR anti-jamming
technology is employing STAP techniques by placing nulls in the
direction of the interference sources, while steering beams toward
targeted satellites for optimal signal reception, therefore
optimizing solutions to every GPS satellite. The latest military
GPS receivers have also been equipped with Selective Availability
and Anti-Spoofing Module (SAASM), which enables them to operate
with encrypted precision satellite signals. The first G-STAR SAASM
application was introduced in the US Air Force JASSM cruise
missile.
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