TOYON RESEARCH CORPORATION — Department of Defense SBIR Phase I: Toyon proposes to develop a precision anti-jam (AJ) GPS receiver for fixed-wing and rotorc

Description

Toyon proposes to develop a precision anti-jam (AJ) GPS receiver for fixed-wing and rotorcraft platforms that provides improved protection against broadband and narrowband jammers, as well as repeaters, spoofers, and multipath using a small-aperture antenna. Adaptive algorithms dynamically switch between a fixed reception pattern antenna (FRPA) mode and a controlled reception pattern antenna (CRPA) mode while minimizing phase errors, thereby enabling precision landings. Anti-jam protection against a large class of broadband jammers and all narrowband jammers is available even when in FRPA mode. In addition, the NAVWAR-compatible system provides new electronic support capabilities that include direction finding, attitude determination, and jammer geolocalization. In particular, the position and 3-D attitude estimate of the navigation system is significantly more robust when fewer than four satellites are available. Moreover, tactical-grade 3 D attitude performance is obtained with commercial-grade inertial measurement unit (IMU) components. An ultra-tightly coupled GPS/IMU architecture with the IMU and antenna having a common center-of-mass reduces lever-arm errors, and the system provides anti-jam protection against jammer multipath caused by the rotating propellers of rotorcraft. Furthermore, the system takes advantage of several novel technologies that reduce power consumption requirements, thereby making the proposed Miniature Attitude-determining Anti-jam GPS/INS (MAAGI) system attractive for SWAP-constrained platforms.