Single-sensor RF emitter localization based on multipath exploitation


This paper considers the matter of passive localization of a wideband RF emitter by exploiting the multipath interaction of the signal with the atmosphere, as occurs in urban settings. The feasibility of localizing using times of arrival (TOAs) of multipath components is examined. Localization of an emitter with a known waveform in an exceedingly bounded three-dimensional volume, without previous information of the time of emission, is shown to be attainable if there are at least 5 TOAs such as known propagation paths. The primary contribution could be a method to properly associate measured TOAs with scattering surfaces. This method can address some unresolved TOAs, plus spurious TOA measurements (muddle). Simulations are used to check the results of scene geometry, litter, and surface roughness on localization performance.

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