NWV Topic 20 Jam-Proof Area Deniable Propagation: Anti-Jam Protection for GPS via Robust Efficient Space-Time Adaptive Processing

摘要

This effort focused on the development of algorithms and systems for protecting military Global Positioning Satellite (GPS) receivers from being jammed. Several very promising signal processing algorithms have been developed that provide a high degree of anti-jam (AJ) protection. An innovative space-time preprocessor was developed based on the multistage nested Wiener filter of Goldstein and Reed. Insight was developed into the dependency of the Wiener-Hopf filter weights on the number of stages and the blocking matrices employed at each stage. The preprocessor was shown to rapidly null out both narrowband and wideband jammers while operating in a reduced-rank mode arid minimizing computational complexity. Smoothing measures were incorporated into the AJ algorithms to minimize any distortion induced on the GPS signals themselves in the process of canceling the jammers. As listed in Section 6, this research has been extensively published in journals and presented at a number of high-profile conferences on signal processing and communications. Transitions of this research to Wright Laboratories at Wright-Patterson Air Force base, Rome Labs, and Eglin Air Force Base are in progress.