Analysis of human backscattering in buildings for through-wall radar applications

A hybrid simulation of wideband polarimetric radar backscatter of humans within a building is introduced. The model is composed of a full-wave simulation tool that can accurately predict the scattering from a realistic human model, and an accurate indoor wave propagation and scattering model, known as bricktracer. These two models are efficiently connected using a Huygen´s interface box that encloses the entire human body. Sample backscattering results for a human walking in a small building were presented. It was shown that the backscatter response of human can be completely obscured by the building backscatter clutter. Time-sequenced subtraction of the backscattered responses using a stationary transceiver was proposed to detect a mover. This method can be used for the development and testing of highly sophisticated location and detection algorithms of humans inside building.