Real-Time Through-Wall Imaging with an
Ultrawideband Radar System

A real-time acquisition and processing architecture has been developed for an ultrawideband (UWB) S-band (2–4 GHz) multiple-input, multiple-output (MIMO) phased- array radar system that facilitates greater than 10 Hz imaging rates, providing a video-like radar image of what is behind a concrete wall.

Video rate imaging enhances the interpretability of range versus range through-wall and free-space radar imagery. Images are formed without a priori information. Video frame-rate imaging is achieved by designing an electronically switched bistatic array using high-performance microwave components, a multithreaded data pipeline, and efficient hardware-accelerated processing algorithms. Experiments successfully image low radar cross-section (RCS) objects, fast-moving objects in free space, and a human behind a 10 cm thick solid concrete wall.


SAR images made with through-wall radar


Details on this technology and its demonstration can be found in

T.S. Ralston, G.L. Charvat, and J.E. Peabody, "Real-time Through-wall Imaging Using an Ultrawideband Multiple-Input Multiple Output (MIMO) Phased Array Radar System," Proceedings of IEEE International Symposium on Phased Array Systems and Technology, 12–15 October 2010, pp. 551–558.
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