TECHNICAL FIELD

The present disclosure relates to light detection and ranging (lidar) systems and, more particularly, to a lidar receiver with dual analog-to-digital converters (ADCs).

BACKGROUND

A measurement system may be used for depth-sensing measurements. For example, a lidar system may transmit pulses of laser light, and may measure reflected pulses to determine a distance of an object from the lidar system. In this case, the lidar system may perform a time-of-flight measurement of the laser pulse and may generate a three-dimensional representation of an object. A frequency-modulated continuous-wave (FMCW) lidar system may transmit continuous laser light according to a prescribed, continuous variation in frequency. In this case, the FMCW lidar system may determine a frequency difference between a received signal and a transmitted signal to generate a three-dimensional representation of an object.

SUMMARY

According to some implementations, a lidar receiver may include: a first frequency filter to pass a first range of frequencies of an analog signal; a second frequency filter to pass a second range of frequencies of the analog signal that is different from the first range of frequencies of the analog signal; a first ADC to derive a first digital signal based on the first range of frequencies of the analog signal using a first sampling rate; and a second ADC to derive a second digital signal based on the second range of frequencies of the analog signal using a second sampling rate that is different from the first sampling rate.

According to some implementations, a lidar system may include a transmitter to transmit an optical beam, and a receiver to receive a reflection of the optical beam, the receiver including: a first frequency filter to pass a first range of frequencies of an analog signal that is based at least in part on the reflection; a second frequency filter to pass a second range of frequencies of the analog signal that is different from the first range of frequencies of the analog signal; a first ADC to derive a first digital signal based on the first range of frequencies of the analog signal using a first sampling rate; and a second ADC to derive a second digital signal based on the second range of frequencies of the analog signal using a second sampling rate that is different from the first sampling rate.

According to some implementations, a method may include filtering, by a lidar system, an analog signal to a first range of frequencies of the analog signal; filtering, by the lidar system, the analog signal to a second range of frequencies of the analog signal; converting, by the lidar system and using a first sampling rate, the first range of frequencies of the analog signal to a first digital signal; converting, by the lidar system and using a second sampling rate that is different from the first sampling rate, the second range of frequencies of the analog signal to a second digital signal; generating, by the lidar system and based on the first digital signal, a first digital representation associated with a first distance range; and generating, by the lidar system and based on the second digital signal, a second digital representation associated with a second distance range.

