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Erschienen in:
2015 | OriginalPaper | Buchkapitel
Target Localization by UWB Signals
verfasst von : Ján Buša
Erschienen in: Numerical Methods and Applications
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Abstract
The high bandwidth of ultra wideband (UWB) radars results in a high spatial resolution, typically a few cm. Thanks to good penetration through materials UWB radars can be very helpful, e.g., also in such situations: through-wall tracking of human beings during security operations, through-rubble localization of motionless persons following an emergency, e.g., earthquake or explosion, through-snow detection of people after an avalanche or through-dress security screening at airports for the detection of non-metal objects etc.
An algorithm for the localization of a point target behind a wall based on the information about times of a signal arrival (TOA) to the receivers will be presented. The 3-dimensional case is considered. We suppose that the permittivity of the considered wall is known. The introduced method may be used for known wall width, and also for the wall width determination.
The determination of the through wall TOA for given point targets, based on Snell’s law, has been considered before by other authors. We solve the inverse problem using the Newton method for the minimization of the least squares objective function.