Submersible GPS Enhancement and Playback System
Prior research has shown the advantages that can be employed by using Digital Storage Receivers to allow processing of the GPS signals after a submarine has submerged to reduce the time spent on surface for covert operations. Under this SBIR effort, we propose to design a Submersible GPS Enhancement and Playback System (SGEPS) based on our prior experience with DSRs that can use a Military Off-the-Shelf GPS receiver for the signal post-processing. This system shall include an RF Capture Device that can record the broadband L1 and L2 GPS sampled signals and a Data Playback System that can exploit both the anti-jam/anti-spoof signal processing capabilities of a MOTS receiver, combined with pre-processing algorithms to detect and excise interfering signals, to enhance the performance of the SGEP System. Under this effort, we shall develop and document the SGEP System design and propose a prototype system to be built and tested under the Phase II effort. Data analysis will also be performed using in-house test equipment to show the expected SGEPS performance, and simulation results will be provided to demonstrate the expected benefits of the proposed signal detection and adaptive interference mitigation algorithms that will be implemented in the Phase II system.
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