Method and apparatus for transreceiving wireless signal in wireless communication system

A user equipment (UE) configured to communicate in a wireless communication system, the UE comprising:

• an Radio Frequency (RF) module;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• generating Uplink Control Information (UCI) and a demodulation reference signal (RS);
• mapping the UCI and the demodulation RS to at least one group of resource elements (REs) in a single Orthogonal Frequency Division Multiplexed (OFDM) symbol duration;
• and
• transmitting, by the RF module, the UCI mapped to the at least one group of REs,
• wherein each of the at least one group of REs comprises twelve contiguous REs including (i) demodulation RS transmission REs, and (ii) UCI transmission REs, and
• wherein, within each of the least one group of REs, each of the demodulation RS transmission REs are spaced apart from each other by only two contiguous UCI transmission REs.