Low-Probability-of-Intercept/Low-Probability-of-Detection (LPI/LPD) Data Link Navy SBIR FY2005.1 Sol No.: Navy SBIR FY2005.1 Topic No.: N05-029 Topic Title: Low-Probability-of-Intercept/Low-Probability-of-Detection (LPI/LPD) Data Link Proposal No.: N051-029-0271 Firm: Nova Engineering, Inc. 5 Circle Freeway Drive Cincinnati, Ohio 45246-1201 Contact: Chris Valk Phone: (513) 554-2076 Web Site: http://www.nova-eng.com Abstract: The role of UAVs in reconnaissance and combat missions is expanding at a rapid rate. One of the key innovations offered by UAVs is the ability to extend the vision of ground units through remote imagery. UAVs also serve as an ideal platform for relaying communications between ground units, because of their wide line of sight. These applications require a radio aboard the UAV to establish a data link with ground units. The limited payload capability of many UAVs have typically resulted in the use of unsophisticated radio systems. Not only are current systems easy to intercept, they also serve as a beacon, divulging the presence and location of the UAV and ground units that are transmitting to it. We propose developing U-DAT, an LPI/LPD data link for use in small to medium size UAVs (such as Dragon Eye and Shadow). The proposed data link uses software defined radio techniques to offer a flexible solution that can be adapted as mission needs change. We will deliver a demonstration of the waveform and functional hardware in Phase I. Benefits: The U-DAT system answers the military's need for an LPI/LPD data link that allows covert use of UAV communications capabilities. U-DAT replaces legacy radio systems currently being used in small and medium size UAVs. The small size of the proposed radio makes it ideal for a wide range of portable applications where covertness is desirable, such as creating an LPI/LPD wireless LAN (WLAN) between ground units. It is also useful in applications where unintentional jamming is an issue, because of the decreased power spectral density of the LPI/LPD waveform. Homeland security is another possible application area in which a covert wireless data network that is resistant to jamming could be useful in rapid response situations. Return