High-resolution weighted range point migration method for fast 3-dimensional imaging with ultra wideband radar

Revised range point migration is a fast, noise-tolerant technology for ultra wide-band imaging. One important application of this technology is security systems to detect concealed weapons in security-controlled places such as train stations or airports. Such systems require higher resolution to distinguish weapons from benign objects or artifacts. In this paper, we propose a modified weighting function for the range point migration method that suppresses sharp amplitude changes due to the interference of multiple scattering waveforms. We apply the proposed method to numerical data to investigate its resolution and performance. We then apply the method to measurement data, which were obtained from a mannequin to demonstrate its imaging capability in a realistic scenario. By introducing this weighting function, results show remarkable improvement in resolution and image quality.