Adaptive Anti-Jam Radio Navy SBIR FY2005.1 Sol No.: Navy SBIR FY2005.1 Topic No.: N05-078 Topic Title: Adaptive Anti-Jam Radio Proposal No.: N051-078-0272 Firm: Nova Engineering, Inc. 5 Circle Freeway Drive Cincinnati, Ohio 45246-1201 Contact: Ken Fischer Phone: (513) 554-2046 Web Site: http://www.nova-eng.com Abstract: NORS (Networked OFDM Ranging System) is a complete positioning solution, composed of an engineered combination of innovative ranging, networking, waveform, and localization technologies. Technical components were selected to perform in the very environments where GPS is most susceptible to failure (urban and subterranean.) The proposed system also achieves GPS level accuracy over an existing communications infrastructure. The NORS system includes an innovative, narrowband ranging technique that is tightly coupled with the OFDM waveform. Furthermore, the implemented system will be capable of establishing range estimates by sniffing conventional JTRS-WNW OFDM data packets. With no transmitter modifications required, a NORS receiver can even derive range estimates from legacy equipment. A networked localization algorithm is also proposed for combining multiple range measurements into the triangulation of each node's absolute position. Range, position, velocity, and time information will be distributed over the network in a completely ad-hoc fashion. This will allow the flow of positioning information from advantaged nodes to disadvantaged (GPS-denied) nodes. The system has also been designed for low power consumption, achieved via a one-way passive ranging algorithm that sharply reduces the amount of data transmitted and through intelligent networking methods that take each node's power attributes into consideration when establishing routes. Benefits: The NORS program will develop a reliable localization surrogate for GPS. GPS has become such an entrenched technology, that positioning service is not a luxury - its depended upon. NORS makes the overall positioning service more reliable, by working in tandem with GPS, and picking up the task when GPS cannot. GPS units for military use must be SAASM compliant, in order to protect classified positioning technology. SAASM GPS units are cost prohibitive for several mission applications that would otherwise enjoy a degree of positioning awareness. A NORS system could operate independently of GPS to provide positioning relative to an anchor point. If global awareness was still required, a NORS network could distribute GPS to all nodes in the network with only a few being GPS-SAASM compliant. NORS is a method for incorporating positioning into cheap, disposable sensor communications packages whose missions do not presently justify the expense of GPS-SAASM units. Return