Performance Improvement of a Class of Array Processors in a Jamming Environment.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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The purpose of this research is to determine the fundamental performance improvement of an optimum array detector versus a conventional beamformer detector in a jamming environment. The fundamental performance improvement is based on total knowledge of both the desired signal and the jammers, and their respective locations in space. The jammers are modeled as a colored noise component in the binary hypothesis detection problem. Mathematical tractability is achieved by considering distributed measurements in space and time accross the array. Conditions are identified which allow determination of the necessary eigenvalues and eigenfunctions by inspection of the propagation functions of plane wave jammers. Maximum improvement for a single jammer occurs when fifty percent of the signal power projects in the direction of the jammer. Performance improvement in the presence of a spatially bandlimited jammer is due primarily to the degradation of the beamformers performance. For the scenarios examined, the optimum detector provides significant performance improvement over the conventional beamformer detector.
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- Radiofrequency Wave Propagation