Communications over Periscope Detection Radar Navy SBIR FY2012.1 Sol No.: Navy SBIR FY2012.1 Topic No.: N121-076 Topic Title: Communications over Periscope Detection Radar Proposal No.: N121-076-0128 Firm: TrellisWare Technologies, Inc. 16516 Via Esprillo Suite 300 San Diego, California 92127-1708 Contact: Sungill Kim Phone: (858) 753-1620 Web Site: www.trellisware.com Abstract: The attributes that imbue a radar sensor with sufficient resolution to detect a small cross-sectional periscope - namely, high gain and high bandwidth - motivate a compelling alternative to SATCOM for antisubmarine warfare command and control: radar communications. A dual mode ASW search and communications system could leverage the existing PDR infrastructure to provide a communications capability, thereby assuring C2 connectivity even when SATCOM access is denied. In order to ensure a high probability of transitioning to the fleet, any communications mode capability developed for PDR must comply with three design constraints: (1) minimized ASW search impact, (2) minimized cost, and (3) maximized communications capability. In the program described herein, TrellisWare proposes to leverage its advanced signal processing toolkit - e.g., per-surivor processing (PSP) and adaptive iterative detection (AID) - as well as a mature, modern forward error correction solution in the design of a dual mode ASW search and communications capability that complies with these design constraints. Benefits: TrellisWare has identified at least four potential avenues for commercialization of the technology that will be developed under the proposed multi-phase SBIR program. First and foremost, TrellisWare will work with the Navy, pertinent Prime Contractors, and other research groups in order to integrate the waveform developed under this program into existing periscope detection radar systems. Second, TrellisWare will leverage its relationships with Prime Contractors in order to find other radar systems that could benefit from dual mode operation. Third, the US Navy is currently investing heavily in single mode underwater acoustic communications. Although the communication channel models for communications over PDR and communications over underwater sonar are very different - e.g., delay and frequency spreads are extreme underwater - the experience garnered by TrellisWare in the integration of dual-mode PDR systems will pave the way for the future commercialization of dual-mode sonar systems. Finally, radar is currently being used for maritime and border security missions. Of particular relevance to this program are applications where size, weight, and power restrictions motivate the use of a common RF aperture and processing chain for radar detection and communications (e.g., ultra-light UAVs). TrellisWare will seek to partner with companies operating in this space in the development and commercialization of dual mode radar and communications systems. Return