1. A method of receiving, by a base station (BS), uplink control information (UCI) in a wireless communication system, the method comprising:transmitting, to a user equipment (UE), physical uplink control channel (PUCCH) resource information for the UCI; and
receiving, from the UE, the UCI on a PUCCH resource,
wherein the UCI is hybrid automatic repeat request (HARQ) feedback information of multiple downlink cells,
wherein, for each of multiple slots in a time domain, the PUCCH resource comprises multiple consecutive resource blocks (RBs) in a frequency domain, and
wherein a long demodulation reference signal (DMRS) sequence is generated for the entirety of multiple consecutive n consecutive RBs.