Adaptive Anti-Jam Radio System (AAJRS) Navy SBIR FY2005.1 Sol No.: Navy SBIR FY2005.1 Topic No.: N05-078 Topic Title: Adaptive Anti-Jam Radio System (AAJRS) Proposal No.: N051-078-1540 Firm: Coherent Logix, Incorporated 101 West 6th Street, Suite 200 Austin, Texas 78701-2932 Contact: David Gibson Phone: (512) 479-7732 Web Site: www.coherentlogix.com Abstract: Coherent Logix, Incorporated (CLX) proposes to develop an adaptive anti-jam radio system (AAJRS) to provide accurate position, velocity, and time (PVT) to friendly military forces in the presence of strong RF interference. Interference may include obscured satellite view, jamming (intentional or not, adaptive or not), and multipath RF propagation conditions. These interference problems increase along shorelines and in urban or mountain settings. In Phase I, CLX will combine RF and advanced signal processing techniques to achieve (under various interference conditions) the PVT accuracy of GPS Precision Positioning Service (PPS) without interference. Specifically, CLX will investigate the use of adaptive antenna techniques, adaptive spectrum management, wideband modulation techniques, link security techniques, link reliability enhancement, and GPS receiver design, in a network context in which part of the network can lock onto the GPS grid and provide position information to the rest of the network. CLX will determine the RF and signal processing requirements and the overall system trade-offs for realistic RF environments. In Phase II, CLX will develop a model of the AAJRS and Concepts of Operation. CLX will perform concept simulations for several antenna configurations including GAS-1, and for a variety of key RF environments. Benefits: The development of AAJRS will provide the Government with the ability to extend precise positioning into areas of GPS shadow and GPS jamming. Precise positioning enables better command techniques to increase mission effectiveness among multiple force units and prevent fratricide. CLX is also developing a high-performance low-power digital signal processor called HyperXTM that will help to miniaturize AAJRS receivers. Return