Student Work

Phase Interferometry Direction Finding

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This paper describes the development of a phase interferometry direction finding system for an airborne platform developed for MIT Lincoln Laboratory. A phase interferometer uses the phase difference to determine the Angle of Arrival (AoA) of a received signal. The team utilized three antennas to resolve phase ambiguities and determined the AoA for received electromagnetic signals in the X band to within 0.1 degrees in simulations including realistic noise models for a 170 degree field of view. A prototype was implemented using an FPGA-based board for data acquisition connected via USB to a PC for analysis, which connected to another PC via a TCP connection for display. The team developed a graphical user interface for the system to display results to a system operator.

  • This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.
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  • E-project-101012-211424
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  • 2012
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  • 2012-10-10
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