The present disclosure relates to a 5th (5G) generation) or pre-5G communication system for supporting a higher data transmission rate beyond a 4th (4G) generation communication system such as long term evolution (LTE). The present disclosure relates to false alarm detection of detecting in a wireless communication system, and an operating method of a receiving node may include receiving a signal from a transmitting node, obtaining a plurality of decoding paths by decoding bits contained in the received signal, and determining whether the decoding is successful based on a detection metric determined based on values representing path metrics of the plurality of the decoding paths.