ARTEMIS (Adaptive Rate Tunable EMI Suppression) for Low SWAP-C M-Code based GPS User Equipment (MGUE)

Anti-jam technology for GPS equipment has traditionally been focused on advanced antenna systems (AAS), which typically have a large multi-element array with high computational complexity and cost. This might be acceptable for some physically large weapon systems, but AAS are not suitable for military equipment with significant SWaP-C limitations, such as handheld GPS receivers, very small unmanned aerial and ground vehicles, underwater INS, etc. Thus, there is a mission critical need for single-antenna digital signal processing (DSP) based radio frequency (RF) interference mitigation (IM) filter technology that can mitigate these remote ORI threats with a very low SWaP-C. Adaptive Dynamics Inc. (ADI), an SBIR company has since 2009 been focused on developing advanced DSP based algorithms, VHDL firmware and ‘RF-In/RF-Out’ hardware appliques for a wide range of DoD IM filtering applications, protecting both narrowband and wideband signals on ground-based, seaborne, airborne and space-based POR platforms. The ADI IM algorithms have been continually enhanced (now in the 3rd Generation) and are known collectively as MAGIC (Multiple Adaptive Generalized Interference Cancellation) IMPS (Integrated Massively Parallel Separators). The MAGIC IMPS algorithm has the following features: Increased IM performance benefit > +40dB for a wide range of challenging ORI types. Ability to mitigate very dense (i.e. large numbers of closely spaced) ORIs. Ability to track and mitigate highly dynamic ORI. Reduced DSP resource utilization tradeoff vs. FPGA clock speed and IM performance. Reduced signal of interest (SOI) distortion and insertion loss. Time-multiplexed processing of multi-channel data streams with fixed latency. Support for multiple digital data rates and SOI bandwidths with a single IM filter. Multiple FPGA device support for all modern Intel and Xilinx FPGA devices. Automatic filter build tool for rapid parameter-driven synthesis of robust VHDL. Integration with other external inputs (e.g. AGC’s, sensors, NIOS processors, etc.) Encrypted VHDL IP which is keyed to the FPGA unique chip ID (UCID/device DNA) This combination of features and capabilities enables robust operation of critical wireless assets and systems under very challenging RF conditions, using a low SWAP-C instantiation of MAGIC IMPS VHDL into the existing waveform FPGA. In Phase 1, ADI proposes to simulate and then demonstrate/test 'ARTEMIS' (the MAGIC IMPS algorithm optimized for M-Code GPS) with operational military GPS M-code User Equipment (MGUE) and a wide range of narrowband and broadband ORI types, utilizing the existing ADI Tactical Multiband Anti-Jam System (TMAJS) RF IM applique to optimize the MGUE filter IM performance and FPGA resource utilization.  In Phase 2, ADI proposes to integrate the MGUE optimized MAGIC IMPS IM filter VHDL code into suitable DoD PoR MGUE with cooperative efforts from M-code-based receiver manufacturers and military underwater navigation system developers.