A method for transmitting and receiving a signal in a wireless communication system and an apparatus therefor are disclosed in the present disclosure. Specifically, a method for transmitting and receiving a signal by a receiving apparatus in a wireless communication system, according to an embodiment of the present disclosure, may comprise the steps of: continuously receiving a plurality of reference signals from a transmitting apparatus; sorting the ranges of channel phases on the basis of the plurality of reference signals; grouping the ranges of the channel phases into two or more groups; and receiving a data signal from the transmitting apparatus.