31 May 2013 Radar tomography assisted three-dimensional localization via the noisy stepped frequency waveform
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Radar tomography has been an active area of investigation at the Air Force Research Laboratory (AFRL) for many years. Building upon this knowledge base, recent efforts have begun to focus on developing synergistic combinations between noise based waveforms and radar tomographic imaging techniques. More specifically, an emphasis has been placed on extending the traditional dimensionality from two to three, while condensing the familiar overall required instantaneous bandwidth for noise based radar systems. Through the inclusion of a Direction of Arrival (DOA) capability into the radar RF architecture, and through back projection processing, a target is capable of being located both in its azimuthal and elevation position between multiple towers. The previously developed Noisy Stepped Frequency (NSF) waveform is utilized as the excitation source from each radar towers thereby reducing the necessary instantaneous bandwidth. The thumb-tack-like response of the NSF waveform provides a sharpened" image of the target and better assists in the localization of the target in its appropriate elevation. The DOA is implemented through the Generalized Cross Correlation (GCC) method. Through the processing combination of back projection and DOA, imaging and localization of both single, and multiple targets is realizable for a three dimensional geometry. Simulated and experimental validations shall be provided and compared.
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Russell Vela, Russell Vela, L. Justin E. Bracken, L. Justin E. Bracken, } "Radar tomography assisted three-dimensional localization via the noisy stepped frequency waveform", Proc. SPIE 8714, Radar Sensor Technology XVII, 87140G (31 May 2013); doi: 10.1117/12.2020599; https://doi.org/10.1117/12.2020599

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