Anti-Jam GPS System for Precision Approach and Landing Navy SBIR FY2011.2 Sol No.: Navy SBIR FY2011.2 Topic No.: N112-092 Topic Title: Anti-Jam GPS System for Precision Approach and Landing Proposal No.: N112-092-0775 Firm: Toyon Research Corp. 6800 Cortona Drive Goleta, California 93117-3021 Contact: Kenan Ezal Phone: (805) 968-6787 Web Site: www.toyon.com Abstract: 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. Benefits: The proposed system provides new capabilities to small-aperture systems and rotorcraft in the form of improved navigation performance for precision landing, electronic protection (EP), and electronic support (ES). In addition, the technology is applicable to a wide range of platforms with severe size, weight, and power (SWAP) constraints including spin-stabilized platforms such as munitions. Return