Patent ID: 8830931

Claim:
A method for transmitting a plurality of sounding reference signals at an user equipment (UE) having multiple antennas in a wireless communication system, the method comprising: generating multiple uplink sounding reference signals for transmitting to a base station by the multiple antennas of the UE; wherein each of the multiple uplink sounding reference signals has different cyclic shift values, wherein the cyclic shift values are generated based on a number of the multiple antennas, indexes of the multiple antennas and a parameter received by high layer signaling; mapping the multiple uplink sounding reference signals to a frequency axis in a last OFDM (Orthogonal Frequency Division Multiplexing) symbol or SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol in an uplink subframe; and transmitting the uplink sounding reference signals to the base station using the multiple antennas of the UE; wherein the parameter includes a Repetition Factor (RPF) increased in proportion to the number of the multiple antennas.