Invention Grant
US07986397B1 FMCW 3-D LADAR imaging systems and methods with reduced Doppler sensitivity 有权
FMCW 3-D LADAR成像系统和具有降低的多普勒灵敏度的方法

FMCW 3-D LADAR imaging systems and methods with reduced Doppler sensitivity
Abstract:
A method for frequency modulated continuous wave LADAR imaging is provided. The method comprises the steps of generating a chirped laser signal and a constant-frequency laser signal, forming a target laser signal from the chirped laser signal and the constant-frequency laser signal and forming a local oscillator laser signal from the chirped laser signal and the constant-frequency laser signal. The method further comprises delaying or frequency shifting the local oscillator laser signal and directing the target laser signal to a target. The method further comprises combining a returned signal received from the target with the delayed or frequency shifted local oscillator laser signal to form a combined received signal, and capturing the combined received signal with a plurality of image sensors. The method further comprises performing a nonlinear operation on the captured combined received signal and Fourier transforming the captured combined received signal to determine a range corresponding to each of the plurality of image sensors in the imaging device.
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