Channel-sounding method using a plurality of antennas, and apparatus for same

摘要

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and to an apparatus for transmitting an SRS in a multi-antenna system. The method comprises the steps of: acquiring specific information for discriminating a first antenna group and a second antenna group from among a plurality of antennas, wherein said first antenna group includes one or more antennas which are set to a turned-on state to perform communication with a base station, and said second antenna group includes one or more other antennas which are set to a turned-off state; transmitting an SRS to the base station if a predetermined condition is satisfied, under the condition that the second antenna group is set to the turned-off state; and setting the second antenna group to a turned-off state after the transmission of the SRS.

主权项

1. A method of transmitting sounding reference signals at a user equipment (UE) in a wireless communication system, the method comprising:
generating, by the UE, sounding reference sequences for multiple antenna ports, each of the generated sounding reference sequences being defined using a base sequence number and a respective one of cyclic shift values for the multiple antenna ports; mapping, by the UE, each of the generated sounding reference sequences to resource elements of a corresponding antenna port on a single carrier frequency division multiple access SC-FDMA symbol of a subframe; and transmitting, by the UE, the mapped sounding reference sequences for the multiple antenna ports within the SC-FDMA symbol of the subframe, wherein one of the cyclic shift values for the multiple antenna ports is specified using a signaled value, and one or more remaining ones of the cyclic shift values for the multiple antenna ports are specified using one or more offsets and the signaled value, and wherein some of the generated sounding reference sequences are mapped to a first set of every two resource elements for a first group of the multiple antenna ports, and the others of the generated sounding reference sequences are mapped to a second set of every two resource elements for a second group of the multiple antenna ports, the second set being different from the first set.