Millimeter-wave compressive holography.


Autoria(s): Cull, CF; Wikner, DA; Mait, JN; Mattheiss, M; Brady, DJ
Data(s)

01/07/2010

Formato

E67 - E82

Identificador

http://www.ncbi.nlm.nih.gov/pubmed/20648123

199443

Appl Opt, 2010, 49 (19), pp. E67 - E82

http://hdl.handle.net/10161/4205

1539-4522

Idioma(s)

ENG

en_US

Relação

Appl Opt

Applied Optics

Applied Optics

Tipo

Journal Article

Cobertura

United States

Resumo

We describe an active millimeter-wave holographic imaging system that uses compressive measurements for three-dimensional (3D) tomographic object estimation. Our system records a two-dimensional (2D) digitized Gabor hologram by translating a single pixel incoherent receiver. Two approaches for compressive measurement are undertaken: nonlinear inversion of a 2D Gabor hologram for 3D object estimation and nonlinear inversion of a randomly subsampled Gabor hologram for 3D object estimation. The object estimation algorithm minimizes a convex quadratic problem using total variation (TV) regularization for 3D object estimation. We compare object reconstructions using linear backpropagation and TV minimization, and we present simulated and experimental reconstructions from both compressive measurement strategies. In contrast with backpropagation, which estimates the 3D electromagnetic field, TV minimization estimates the 3D object that produces the field. Despite undersampling, range resolution is consistent with the extent of the 3D object band volume.