Method for transmitting or receiving uplink signal in wireless communication system and device therefor

A terminal configured to transmit an uplink signal in an unlicensed band a wireless communication system, the terminal comprising:

• a transmitter and a receiver;
• and
• a processor that:
• controls the transmitter and the receiver, wherein the processor receives a scheduling indication for one or more transmission time intervals (TTIS);
• performs channel sensing in a clear channel assessment (CCA) gap for the one or more TTIs according to the received scheduling indication, and
• transmits an uplink reference signal for the one or more TTIs in a predetermined symbol based on that channel sensing is successfully performed for at least one of the one or more TTIs,
• wherein the uplink reference signal is transmitted in a partial frequency resource of the predetermined symbol, and
• wherein the channel sensing is performed only in a partial frequency resource within the CCA gap corresponding to a partial frequency resource of the predetermined symbol.