Uplink mimo communication method in wireless communication system and apparatus therefor

A method of receiving a signal, which is received by a user equipment (UE) in a wireless communication system supporting multiple antennas, the method comprising:

• receiving a subframe from a first antenna and a second antenna of a transmitting end using a resource allocated to uplink;
• and
• estimating a channel from the first antenna and a channel from the second antenna based on predetermined precodings applied to a first data received from the first antenna and predetermined precodings applied to a second data received from the second antenna,
• wherein first demodulation reference signals (DMRSs) corresponding to the first antenna port and second DMRSs corresponding to the second antenna port are mapped to first orthogonal frequency division multiplexing (OFDM) symbols in the subframe,
• wherein a first data corresponding to the first antenna port and a second data corresponding to the second antenna port are mapped to second OFDM symbols except the first OFDM symbols in the subframe, and
• wherein the predetermined precodings are changed according to indexes of the second OFDM symbols.

A user equipment (UE) in a wireless communication system supporting multiple antennas, the UE comprising:

• a transmitter configured to transmit a signal;
• and
• a processor configured to control the transmitter,
• wherein the processor configured
• to map first demodulation reference signals (DMRSs) corresponding to a first antenna port and second DMRSs corresponding to a second antenna port to first orthogonal frequency division multiplexing (OFDM) symbols in a subframe,
• to map a first data corresponding to the first antenna port and a second data corresponding to the second antenna port to second OFDM symbols except the first OFDM symbols in the subframe,
• to transmit the subframe using a resource allocated to uplink,
• wherein predetermined precodings are applied to the first data and the second data, and
• wherein the predetermined precodings are changed according to indexes of the second OFDM symbols.

A user equipment (UE) in a wireless communication system supporting multiple antennas, the UE comprising:

• a receiver configured to receive a signal;
• and
• a processor configured to control the receiver,
• wherein the processor configured
• to receive a subframe from a first antenna and a second antenna of a transmitting end using a resource allocated to uplink,
• to estimate a channel from the first antenna and a channel from the second antenna based on predetermined precodings applied to a first data received from the first antenna and a second data received from the second antenna,
• wherein first demodulation reference signals (DMRSs) corresponding to the first antenna port and second DMRSs corresponding to the second antenna port are mapped to first orthogonal frequency division multiplexing (OFDM) symbols in the subframe,
• wherein a first data corresponding to the first antenna port and a second data corresponding to the second antenna port are mapped to second OFDM symbols except the first OFDM symbols in the subframe, and
• wherein the predetermined precodings are changed according to indexes of the second OFDM symbols.