title: Adaptive millimeter-wave synthetic aperture imaging for compressive sampling of sparse scenes.
abstract: We apply adaptive sensing techniques to the problem of locating sparse metallic scatterers using high-resolution, frequency modulated continuous wave W-band RADAR. Using a single detector, a frequency stepped source, and a lateral translation stage, inverse synthetic aperture RADAR reconstruction techniques are used to search for one or two wire scatterers within a specified range, while an adaptive algorithm determined successive sampling locations. The two-dimensional location of each scatterer is thereby identified with sub-wavelength accuracy in as few as 1/4 the number of lateral steps required for a simple raster scan. The implications of applying this approach to more complex scattering geometries are explored in light of the various assumptions made.
authors.forename: Alex
authors.initials: A
authors.lastname: Mrozack
authors.forename: Martin
authors.initials: M
authors.lastname: Heimbeck
authors.forename: Daniel L
authors.initials: DL
authors.lastname: Marks
authors.forename: Jonathan
authors.initials: J
authors.lastname: Richard
authors.forename: Henry O
authors.initials: HO
authors.lastname: Everitt
authors.forename: David J
authors.initials: DJ
authors.lastname: Brady