Field Imaging Radar/Lidar Through Fourier Transform Heterodyne
LOS ALAMOS NATIONAL LAB NM
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We present a detection process capable of directly imaging the transverse amplitude, phase, and Doppler shift of coherent electromagnetic fields. Based on coherent detection principles governing conventional heterodyned RADARLIDAR systems, Fourier Transform Heterodyne incorporates transverse spatial encoding of the reference local oscillator for image capture. Appropriate selection of spatial encoding functions allows image retrieval by way of classic Fourier manipulations. Of practical interest i imaging may be accomplished with a single element detectorsensor requiring no additional scanning or moving components, ii as detection is governed by heterodyne principles, near quantum limited performance is achievable, iii a wide variety of appropriate spatial encoding functions exist that may be adaptively configured in real-time for applications requiring optimal detection, and iv the concept is general with the applicable electromagnetic spectrum encompassing the RF through optical.
- Active and Passive Radar Detection and Equipment