Joint Navigation Conference 2016: Session C7: Military GPS/Antenna Technologies and Interference Mitigation

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Joint nav conference

Session C7: Military GPS/Antenna Technologies and Interference Mitigation

Jammer Detection and Angle-of-Arrival Estimation Capability in GPS Anti-Jam Antenna System (GAJAS)

By: Huan-Wan Tseng, Christopher Zarowski and Naresh Babu Jarmale, Mayflower Communications Company; Patrick Pitoscia, US Army
Location: Room 306
Alternate Number 1

Mayflower’s GPS Anti-Jam Antenna System (GAJAS), being designed to operate with co-located U.S. Army PM-PNT Pseudolites (PL), is an integrated NAVWAR Electronic Protection (EP) system for use in protecting reference GPS receiver onboard PL transmitter platform against various interference sources such as strong co-site PL transmission, Blue Force Electronic Attack (BFEA), and hostile jamming. The GAJAS system is being modified and upgraded to provide jammer detection and angle-of-arrival (AOA) estimation capability to provide useful Electronic Support (ES) information for NAVWAR situation awareness with minimal size, weight, and power (SWaP) impact to the host PL platform. The GAJAS system is being implemented on an FPGA/microprocessor based antenna electronics (AE) prototype together with small controlled reception pattern antenna (s-CRPA).
In this paper, we will present a system-level architecture for the jammer detection (i.e. estimate the number of jammers) and AOA estimation along with GPS anti-jam with supporting simulation results and preliminary laboratory test results. The jammer detection is based on theoretical information criterion, and the AOA estimation is based on subspace signal processing methods.