Locating the Jammer using A/J Software Receiver

Andrew Brown, Suman Ganguly, Aleksandar Jovancevic, Nikhil Bhatia and Yoonjae Lee

Abstract:	Anti-Jam (A/J) receivers use multiple antenna elements and the receiver processor performs STAP type processing to project nulls towards the jammer. This is the most effective A/J technique against broadband jammers in the GPS band. Detection of the jamming signal in presence of noise, however, may be difficult, particularly for weak jammer or spoofers. Several approaches and algorithms can be used under different situations. We present simulation of several such situations and describe the performances using different approaches. A precision search method borrowing the search techniques of monopulse radar is developed and the results described. The techniques can be adapted for different situations (number of jammers, dynamics etc.) and are optimized for reduced antenna requirements. The techniques can be extended to jammer identification- with appropriate jammer data base. Implementation of these different algorithms becomes relatively straight forward using the “software radio” approach. The software GPS receiver platform developed by us is used to implement these different architectures and perform real time test and validation.
Published in:	Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004) September 21 - 24, 2004 Long Beach Convention Center Long Beach, CA
Pages:	110 - 121
Cite this article:	Brown, Andrew, Ganguly, Suman, Jovancevic, Aleksandar, Bhatia, Nikhil, Lee, Yoonjae, "Locating the Jammer using A/J Software Receiver," Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004), Long Beach, CA, September 2004, pp. 110-121.
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