Wideband Radio Local Interference Optimization Techniques Navy SBIR FY2011.2 Sol No.: Navy SBIR FY2011.2 Topic No.: N112-170 Topic Title: Wideband Radio Local Interference Optimization Techniques Proposal No.: N112-170-1176 Firm: Adaptive Dynamics, Inc 11829 La Colina Rd. San Diego, California 92131-1415 Contact: Brandon Zeidler Phone: (858) 705-2781 Web Site: http://info.adaptive-dynamics.com Abstract: Adaptive Dynamics has developed a Multiple Adaptive Generalized Interference Cancellation (MAGICTM) hardware prototype filter that has demonstrated robust performance for protecting current narrowband UHF SATCOM systems against both narrowband and frequency dynamic interference without any prior knowledge of the interference characteristics. This filter provides a radical departure from the traditional techniques for interference mitigation based on classical Weiner-based adaptive filtering approaches. Whereas the traditional gradient-based techniques often exhibit poor convergence and tracking in tactical communication applications, the MAGICTM filter directly addresses the problem of estimating, tracking and cancelling numerous signals, and provides robust communications capabilities in the presence of severe, dynamically changing interference. A detailed plan is provided to modify and implement the existing narrowband version of the MAGICTM filter and evaluate the performance of a new wideband version for mitigation of the various types of dynamic interference, both narrowband and wideband, that could degrade the performance of the MUOS 5 MHz UHF SATCOM system. Leveraging a WCDMA testbed developed under prior work, preliminary results for applying the modified broadband MAGICTM filter to the 5 MHz WCDMA waveform indicate excellent performance for mitigating extremely strong narrowband and 5 MHz chirped interference. Benefits: The proposed filter will restore operation of tactical wideband UHF SATCOM systems in the presence of extreme RF interference for both narrowband and wideband interference waveforms. The technology is also applicable to both commercial terrestrial and satellite communications systems such as HSPDA, WiMax, and navagation systemss such as the Global Positioning System (GPS). Return