Precise Positioning with Local Signal Carrier Phase Measurements, Global Positioning System (GPS) and Inertial Data 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, Global Positioning System (GPS) and Inertial Data Fusion Proposal No.: N14A-009-0207 Firm: Qunav LLC 324 Sudduth Cir NE Fort Walton Beach, Florida 32548 Contact: Andrey Soloviev Phone: (740) 541-1529 Abstract: QuNav and Illinois Institute of Technology propose the development of local-radio carrier phase methodology mechanization. Phase I will develop carrier phase tracking approach; and, precise positioning mechanization. Carrier phase of CDMA signals (such as pseudolites) will be tracked by utilizing the GPS receiver design to minimize changes for legacy receivers. For TDMA radios (such as Link 16), our innovative tracking approach will maximize the use of existing communication receivers (an inner loop for symbol decoding) and will add two additional layers (a mid-loop for tracking over the dedicated time slot and a feed-forward loop for coasting over idle periods) to enable the tracking of carrier phase. The proposed methodology of precise positioning is based on a carrier phase-only estimation approach. Highly accurate positioning is enabled by observing local-radio transmitters from multiple locations over time (thus synthesizing a favorable measurement geometry) and applying displacement information (derived from temporal phase changes) to combine these multiple observations. The proposed development starts from local-radio positioning mechanization, then augments it with inertial navigation, and finally adds GPS measurements. It is expected that the use of local radio carrier phase will enable automated landing scenarios such as Case-I shipboard landing, which is challenging to GPS alone. Benefits: When successfully demonstrated, the proposed carrier phase positioning methodology has a significant potential for a variety of DoD and commercial applications. Automated shipboard landing is envisioned as the main direction for transitioning the technology to military applications. This direction will be pursued jointly with Engility Corporation. Commercial applications include pedestrian positioning in urban canyons and indoors with digital television and cellular phone signals; and, automotive safety applications where precise positioning with integrity can be enabled by using carrier phase measurements derived from infrastructure-to-vehicle and vehicle-to-vehicle communication signals. Return