Imaging and Computing Seminar

Birsen Yazici, Mathematics, RPI

Passive Synthetic Aperture Imaging

I will present novel synthetic-aperture imaging modalities for radar/sonar that rely on sources of opportunity. In particular, I will present two new modalities which we refer to as "hitchhiker" and "Doppler hitchhiker". Both modalities involve receivers only and use sources of opportunity, such as TV, radio, or WiFi signals (or ambient sound) to form an image. While hitchhiker uses delayed and correlated measurements and is suitable for wideband sources of opportunity, Doppler hitchhiker uses scaled and correlated measurements and can form high resolution images using single frequency sources of opportunity. I will derive forward maps in the form of Fourier Integral Operators for both modalities; present the underlying imaging geometry and describe the image formation using microlocal techniques.