Patent ID: 11874378
Assignee: RAYTHEON COMPANY
Field: Measurement (Instruments)
Classification: CPC G  F | IPC F  G

Claim 9:
10. An apparatus comprising:
at least one processor configured to:
generate, based on an output of a Doppler sensor that is based on (i) local oscillator (LO) illumination and (ii) a first portion of return illumination that comprises coherent flood illumination reflected off a remote object, Doppler shift data for a Doppler shift corresponding to a longitudinal velocity of the remote object relative to a coherent imaging system;
receive, from a focal plane array, light intensity data that is based on (i) a second portion of the return illumination and (ii) Doppler-shifted LO illumination that is based on the Doppler shift data; and
generate, based on the light intensity data, an image of the remote object;

wherein, to generate the image of the remote object, the at least one processor is configured to:
perform fast Fourier transform (FFT)-based signal processing of the light intensity data to produce digital image data and a digital complex-valued image;
perform FFT-based signal processing of the digital image data and the digital complex-valued image to generate a high energy laser (HEL) spot image and a target image; and
overlay the HEL spot image with the target image.