Multi-Static Coherent LiDAR

An apparatus, comprising:

• at least one transmitter comprising a send aperture configured to provide at least one beam of a transmitted optical wave along a transmission angle toward a target location;
• two or more receivers, each receiver comprising:
• a receive aperture arranged in proximity to at least one of the send aperture or a receive aperture of a different receiver, the receive aperture being configured to receive at least a portion of a first collected optical wave arriving at the receive aperture, and
• a detector configured to provide a signal based on the received portion of the first collected optical wave;
• and
• circuitry configured to determine an estimated distance associated with the first collected optical wave based at least in part on a combination that includes a respective component corresponding to each of two or more of the signals provided from the detectors of the two or more receivers;
• wherein the send aperture is further configured to receive at least a portion of a second collected optical wave arriving at the send aperture and at least one of the receive apertures.