Method and apparatus for transmitting a reference signal in a wireless communication system

A user equipment for transmitting a reference signal in a wireless communication system, the user equipment comprising:

• a transceiver configured to transmit and receive a radio signal;
• and
• a processor operatively coupled to the transceiver and configured to:
• select one or more values among a set {0, 3, 6, 8, 10},
• cyclically shift a base sequence based on the one or more values selected from the set {0, 3, 6, 8, 10}, and
• transmit the reference signal based on the cyclically shifted base sequence to a base station,
• wherein the reference signal is transmitted on a first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol,
• wherein the first OFDM symbol is a second OFDM symbol among 7 OFDM symbols in one slot, and
• wherein the second OFDM symbol is a sixth OFDM symbol among the 7 OFDM symbols in the slot.