Through wall imaging: Historical perspective and future directions

Through wall imaging is highly desirable for police, fire and rescue, first responder, and military applications. The ultimate desire of such system is to provide detailed information in areas that cannot be seen using conventional measures. Borrowing from successes in geological and medical imaging environments, researchers are applying radio frequency (RF) and other sensing modes to penetrate wall materials and make intelligent decisions about the contents of rooms and buildings. For this application, they are many propagation differences that provide unique challenges that must be addressed to make through wall penetration sensors operationally viable. This paper outlines the historical context of early research as well as providing new directions for future research in this exciting interplay between electromagnetic propagation, signal processing, and knowledge-based reasoning algorithms.

[1]  G.A. Tsihrintzis,et al.  Maximum likelihood estimation of object location in diffraction tomography , 1991, IEEE Trans. Signal Process..

[2]  Lawrence M. Frazier Surveillance through walls and other opaque materials , 1995, Defense, Security, and Sensing.

[3]  Eugene F. Greneker,et al.  RADAR flashlight for through-the-wall detection of humans , 1998, Defense, Security, and Sensing.

[4]  David D. Ferris,et al.  Survey of current technologies for through-the-wall surveillance (TWS) , 1999, Other Conferences.

[5]  Mark A. Barnes,et al.  Ultrawideband through-wall radar for detecting the motion of people in real time , 2002, SPIE Defense + Commercial Sensing.

[6]  S. Gavrilov,et al.  Methods of improving of the subsurface objects images reconstructed by the tomography process , 2002, International Conference on Mathematical Methods in Electromagnetic Theory.

[7]  K. Sarabandi,et al.  Through wall imaging at microwave frequencies using space-time focusing , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[8]  Qing Huo Liu,et al.  Through-wall imaging (TWI) by radar: 2-D tomographic results and analyses , 2005, IEEE Trans. Geosci. Remote. Sens..

[9]  Moeness G. Amin,et al.  Autofocusing of Through-the-Wall Radar Imagery Under Unknown Wall Characteristics , 2007, IEEE Transactions on Image Processing.

[10]  Yimin Zhang,et al.  Three-Dimensional Wideband Beamforming for Imaging Through a Single Wall , 2008, IEEE Geoscience and Remote Sensing Letters.