Power Aware Anti-Jam/Anti-Spoof Processing

ABSTRACT:Toyon proposes to develop a power-aware high-integrity navigation system for size, weight, and power constrained platforms, which provides improved electronic protection against broadband and narrowband jammers, as well as repeaters, spoofers, and multipath using a small-aperture antenna. Power-saving design changes are proposed to all aspects of the system, including the radio-frequency (RF) front-end, analog-to-digital conversion (ADC), anti-jam (AJ) GPS processing, correlation processing, and navigation processing. All changes are compatible with the Selective Availability Anti-Spoof Module (SAASM) and future Common GPS Module (CGM) processing. The navigation performance of the system is enhanced through new electronic support capabilities that include direction finding (DF), attitude determination, and jammer geolocalization. Anti-jam processing requirements are reduced by as much a 95%, depending on the specific circumstances. The highly integrated system design provides an ultra-tightly coupled (UTC) GPS/IMU architecture with the IMU and antenna having a common center-of-mass, thereby reducing lever-arm errors, and carrier-phase distortions are minimized through novel processing techniques. In addition, variable dynamic range algorithms reduce power consumption by matching the system dynamic range to the jammer signal power, thereby making the proposed Power-Aware Miniature Attitude-determining Anti-jam GPS/INS (MAAGI) system highly attractive for small platforms with severe size, weight and power (SWAP) constrains.BENEFIT:The Power-Aware Miniature Attitude-determining Anti-jam GPS/INS (MAAGI) system has the potential to revolutionize anti-jam GPS systems for C-SWAP-constrained systems in both civilian and military applications. The scalable design will permit the same architecture to serve diverse classes of platforms, thereby increasing the system utility and sales, and therefore reducing its cost. Furthermore, ultra-tightly coupled (UTC) GPS/INS systems have the ability to improve the anti-jam GPS performance of platforms whether or not they are capable of supporting large antenna arrays or have severe cost and power constraints.