A LIDAR system includes a reference light source configured to generate an outgoing light signal that includes multiple reference channels that each has a different frequency. The system also includes a comparative light source configured to generate an outgoing light signal that includes multiple comparative channels. Each of the comparative channels has a different frequency. The comparative channels are each associated with one of the reference channels in that LIDAR data is generated for a sample region on a field of view using a comparative channel and the associated reference channel. The comparative channel and the associated reference channel have different frequencies.