Multi-channel coherent lidar apparatus

A LiDAR apparatus which comprises a plurality of channels and measures information on a distance of a target by receiving light reflected by the target after radiating light to the target, the LiDAR apparatus comprising:

• a plurality of analog-to-digital converts (ADCs) each configured to receive the reflected light reflected by the target and to convert the reflected target signal into a digital signal;
• one or more modulation units configured to receive the digital signals that have passed through some or all of the ADCs and channel signals having different frequencies or types and to modulate the digital signals;
• an adder configured to integrate the signals that have been modulated and received from the modulation units;
• a fast Fourier transform (FFT) unit configured to convert one signal integrated by the adder into a signal in a frequency domain;
• and
• a detection unit configured to detect the information on the distance of the target based on the signal converted into the signal in the frequency domain through the FFT unit.