Precise Positioning with Local Signal Carrier Phase Measurements and Global Positioning System (GPS) Fusion Navy STTR FY2014.A Sol No.: Navy STTR FY2014.A Topic No.: N14A-T009 Topic Title: Precise Positioning with Local Signal Carrier Phase Measurements and Global Positioning System (GPS) Fusion Proposal No.: N14A-009-0321 Firm: GIRD Systems, Inc. 310 Terrace Ave. Cincinnati, Ohio 45220 Contact: James Caffery Phone: (513) 281-2900 Web Site: www.girdsystems.com Abstract: Carrier phase measurements in GPS are well known to enable precision performance. However, GPS is easily degraded or jammed. Carrier phase measurements in a local radio system, on the other hand, is much easier due to its much stronger signal level compared with GPS. In this proposal GIRD Systems will investigate feasibility of precise positioning techniques based on carrier phase measurements from a local radio system of transmitters and receivers. We will also make maximal reuse of GPS receiver tracking circuitry as much as possible. Furthermore, a Kalman filter will be developed integrating the local radio system with on-board IMU. Simulation study will be performed to test the feasibility. Benefits: The proposed local radio positioning system has potentially multiple advantages over GPS: less vulnerable to jamming, less sensitivity to multipaths, faster Kalman filter convergence and higher receiver dynamics. The developed system can be used for landing an aircraft on a ship, as well as many other applications requiring precision location information. Return