Patent ID: 8503561

Claim:
A method of transmitting a signal in a wireless communication system, the method performed in a single user equipment (UE) comprising: receiving single cyclic information via a physical downlink control channel (PDCCH); and transmitting, in response to the single cyclic information, reference signals through a first transmit antenna and a second transmit antenna using one pair of available cyclic shift pairs, each pair of the available cyclic shift pairs comprising a first cyclic shift n 1 , for the first transmit antenna and a second cyclic shift n 2 for the second transmit antenna, the first and second transmit antennas being used by the single UE, wherein the single cyclic information indicates the first cyclic shift n 1 , the second cyclic shift n 2 is cyclic shift, n 1 and n 2 ″ is replaced by determined based on the first cyclic shift n 1 in the UE, n 1 and n 2 contained in one pair of the available cyclic shift pairs are different from cyclic shifts n 1 and n 2 contained in another pair of the available cyclic shift pairs, respectively, and an interval between the n 1 and n 2 in each pair of the available cyclic shift pairs is set to a same value.