A method and a setup for light detection and ranging are disclosed. The setup is configured to carry out the following method: generating signal radiation (S) at multiple signal frequencies (fs) with an optical signal source (1), wherein the signal radiation (S) exhibits random signal modulations preferably at each of the multiple signal frequencies (fs), splitting the signal radiation (S) into a target radiation part (T) and a reference radiation part (R), directing the target radiation part (T) towards a target (2), detecting a target signal (IT), wherein the target signal is associated with a reflected portion (TR) of the target radiation part being reflected from the target (2), detecting a reference signal (IR), wherein the reference signal is associated with the reference radiation part (R), and deriving at least one ranging information parameter from the target signal (IT) and the reference signal (IR).