Ultra Tight GPS/INS Integration

We propose to design and develop an advanced GPS/INS integrated system for anti-jam and high dynamics conditions. Integration between GPS and INS will be performed in a federated sense using ultra-tight coupling. CRS has developed a novel GPS developmentsystem consisting of integrated software tools and hardware modules. These tools allow simulation and real-time implementation in a single step as well as easy access to the GPS receiver internals (correlators and their internal components, i.e.). Theywill provide simulation and rapid prototyping of advanced GPS/INS integration. Our concept is based on developing a dual frequency (front end) GPS software (correlators contained in software) receiver and ultra-tightly coupled GPS/IMU integration scheme.This concept maximizes operation of GPS in jamming environments and optimizes navigation accuracy even when GPS has limited availability. We propose to perform simulations and trade-off analysis using our flexible software receivers, software simulatorsand associated products. Trade off analysis will allow us to select the optimum coupling scenario and also design GPS architecture in order to maximize the GPS/IMU integration. We propose to demonstrate the performance of the composite system viasimulation during Phase I. The fabrication and field test of the system will be performed during Phase II. The removal of the acquisition stage from the GPS guided munition coupled with ultra-tight coupling results in highly accurate navigation solutionseven under high dynamic, high jamming conditions and can find numerous applications in DoD. The capability to operate in indoor environments will increase the range of applications for the GPS based system.