Low cost, lightweight, low power Precise Positioning System (PPS) GPS Solution for Software Defined Radios
Navy SBIR 2007.3 - Topic N07-198
SPAWAR - Ms. Linda Whittington - linda.whittington@navy.mil
Opens: August 20, 2007 - Closes: September 19, 2007

N07-198 TITLE: Low cost, lightweight, low power Precise Positioning System (PPS) GPS Solution for Software Defined Radios

TECHNOLOGY AREAS: Information Systems, Electronics, Battlespace

ACQUISITION PROGRAM: Joint Tactical Radio System (JTRS) JPEO, ACAT I

OBJECTIVE: Develop technology for the software implementation of a military GPS embeddable solution that will support the Precise Positioning Service (PPS), include GPS functions such as Selective Availability Anti-Spoofing Module (SAASM) functionality, and provide timing data.

DESCRIPTION: Next-generation communications, sensors, and weapon systems, as well as consumer electronics, are increasingly implementing functionality using software rather than hardware-implemented techniques, such as the use of gate arrays or ASICs. Although radio communications, surveillance, and sensor system functionalities are being developed as software applications running on a reconfigurable software-based platform, high-accuracy and secure GPS functionality currently must be provided by external hardware. Although perhaps acceptable for environments in which volume, weight, and power consumption are not concerns, this situation prevents warfighters from utilizing the secure GPS capability when using handheld radios and sensors in scenarios in which mobility, human endurance, or rapid responsiveness is critical -- such as the current conflict in Iraq. This project addresses the initial stages of the development of a software-implemented military GPS capability that can be utilized by Software Defined Radios (SDRs), sensors, and weapons.

PHASE I: Develop an architecture for software-implemented GPS functionalities and demonstrate the feasibility of embedding it into a tactical SDR. Develop a subset of GPS capabilities in order to perform lab testing needed to validate the estimates of processor and relative power consumption requirements. Provide a roadmap for Phase II and beyond to provide an end solution that can be certified against the PPS GPS and tactical SDR security requirements. The general concept should be applicable to all tactical radio form factors and be adaptable to sensor and weapon use.

PHASE II: Build an unclassified prototype of the GPS solution for test and evaluation, preferably utilizing representative tactical SDR hardware. Implement unclassified "strawmen" versions of military GPS precision and security functions to validate the architecture and processor requirements. This prototype will be evaluated by to determine the feasibility of certifying the final product.

PHASE III: Complete the full-up development of the SAASM and PPS capabilities. Demonstrate capabilities using representative JTRS SDR hardware. Support the government in obtaining certification. Support radio vendors in integrating the software into their SDR products.

PRIVATE SECTOR COMMERCIAL POTENTIAL: Homeland Security initiatives are driving municipal, county, state, and federal agencies to obtain an interoperable communications capability. Software Defined Radio and digital communications approaches are emerging as the next-generation solution to robust interoperability. The technology developed from this topic is directly applicable to these non-DOD interoperable communications applications providing an embedded positioning capability within these radios to improve situational awareness and radio networking.

REFERENCES: 1. "JTRS HMS Capabilities", http://www.gdc4s.com/documents/JTRSHMS_092906.pdf

2. "Defense Dept. Studying Options to Lower Cost of GPS Receivers", http://www.nationaldefensemagazine.org/
issues/2004/May/Defense_Dept.htm

3. "Implementing a GPS waveform under the Software Communications Architecture", http://www.navsys.com/Papers/06-11-003.pdf

KEYWORDS: JTRS; SDR; GPS; SAASM; HMS; PPS

N07-198: dean.nathans@navy.mil

TPOC:
Phone: (619) 553-1283
Fax:
Email: Dean Nathans
2nd TPOC: Alan Sweeney
Phone: (619) 524-0022
Fax:
Email: alan.sweeney@navy.mil

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