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Important Dates

Conference: May 7-11, 2012
Reg. Registration Ends: April 20, 2012
Late Registration: April 21 to May 11

Through-the-Wall Radar Imaging


Date: May 11, 2011
Time: 8:00am - 12:00pm
Instructor: Fauzia Ahmad

Tutorial Code: T-10


Through-the-Wall Radar Imaging (TWRI) is an emerging technology that provides vision into otherwise obscured areas, thereby, facilitating information-gathering and intelligent decision-making. The objectives of “seeing” through walls include the determination of the building layouts, discerning the intent of activities inside the building, or detecting, locating, tracking, and imaging of targets inside enclosed structures. These three areas of attributes are highly desirable for a range of civil and military applications, examples being search and rescue missions, hostage rescue situations, and surveillance and reconnaissance in urban environments.  Although radio frequency is the modality of choice for these applications, it is well known that electromagnetic waves passing through a medium are subject to amplitude and phase distortion, rendering sensing through walls a complex and difficult problem.  There are many challenges facing TWRI system development, namely, the system should be reliable and portable, with both short set-up time and acquisition time. System performance should be robust to ambiguities in wall characterization and should properly function under non-uniform wall, multiple walls, and operator motion. The system should have high range and cross-range resolutions that are application specific. Finally, it must be able to detect and classify motions in the presence of heavy clutter, which may include interior back and side walls, water pipes, and various types of furniture items. In this tutorial, we present a comprehensive treatment of TWRI which encompasses many facets of signal analysis and processing. More specifically, focus will be on through-the-wall beamforming/backprojection, wall clutter mitigation, compressive sensing for fast data acquisition, change detection for MTI, and multipath exploitation, all of which are an integral part of candidate solutions to pressing problems facing the TWRI technology.

Instructor Biography

Dr. Fauzia Ahmad received her Ph.D. degree in Electrical Engineering in 1997 from the University of Pennsylvania, Philadelphia, PA. Since 2002, she has been with the Center for Advanced Communications, Villanova University, Villanova, PA, where she is now a Research Professor and the Director of the Radar Imaging Lab. Dr. Ahmad’s main research interest is in the areas of radar imaging, waveform design, array signal processing, radar signal processing, compressive sensing, and MIMO radar systems. She has two book chapters and over 100 journal articles and peer-reviewed conference papers in the aforementioned areas. She has been an invited speaker twice at the NATO SET-100 Task Group meetings on Sensing Through the Walls Technologies. She has coauthored a book chapter on Conventional and Emerging Waveforms for Detection and Imaging of Targets Behind Walls, which appears in the 2010 Edited CRC Press Book titled ‘Through the Wall Radar Imaging’. She has organized and co-chaired special sessions on through-the-wall radar imaging and urban sensing in the 2007 IEEE Workshop on Signal Processing Applications for Public Security and Forensics (SAFE07), and the 2008 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP08). Dr. Ahmad has been one of the lead investigators on several contracts and grants related to urban sensing from the US Federal agencies, including ARL, ARO, DARPA, AFRL, ONR, and the NSF.  She is a senior member of IEEE.