Light detection and ranging device using combined optical signals

A method comprising:

• illuminating a target with a hybrid transmission signal comprising a first signal from a first signal source and a second signal from a second signal source, the first signal for measuring a velocity of the target and the second signal for measuring a range of the target;
• receiving a reflection signal produced by reflection of the hybrid transmission signal by the target;
• deriving range data from a photodetector configured to measure the range of the target based on a first component of the reflection signal;
• and
• deriving related to the range and velocity data from a second photodetector configured to measure the velocity of the target based on a second component of the reflection signal related to the velocity.

A sensing system comprising:

• a computing device configured to:
• generate a combined signal from at least a first signal source and a second signal source, the first signal source configured to generate a first signal for measuring a velocity of a target and the second signal source configured to generate a second signal for measuring a range of the target;
• transmit the combined signal;
• and
• derive range data from a first photodetector configured to measure the range of the target based on a first component of a reflection signal received responsive to transmission of the combined signal;
• and
• derive velocity data from a second photodetector configured to measure the velocity of the target based on a second component of the from a reflection signal received responsive to transmission of the combined signal.