Method and apparatus for transmitting uplink signals using multi-antenna
AssigneeLG Electronics Inc.
InventorsYu Jin NOH, Ki Jun KIM, Dong Wook ROH, Byeong Woo KANG, Dae Won LEE, Bong Hoe KIM, Dong Youn SEO
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Abstract
A method and apparatus for allowing a UE to transmit uplink signals using a MIMO scheme are disclosed. In order to maintain good Peak power to Average Power Ratio (PAPR) or Cubic Metric (CM) properties when the UE transmits uplink signals using the MIMO scheme, the UE uses a precoding scheme based on a precoding matrix established in a manner that one layer is transmitted to each antenna in specific rank transmission.
Claims6
A method for a user equipment (UE) to transmit uplink signals, the method comprising:
- precoding signals of 2 layers by using a specific precoding matrix P multiplied by a predetermined constant value, wherein the specific precoding matrix P is selected from a Rank 2 codebook consisting of a first type of
- [
- 1
- 0
- X
- 0
- 0
- 1
- 0
- Y
- ]
- ,
- a second type of
- [
- 1
- 0
- 0
- 1
- X
- 0
- 0
- Y
- ]
- ,
- and a third type of
- [
- 1
- 0
- 0
- 1
- 0
- Y
- X
- 0
- ]
- ,
- where ‘X’ and ‘Y’ are selected from among {1, j, −1, −j}, and
- transmitting the precoded signals to a base station via 4 transmission antennas.
A user equipment (UE) for transmitting uplink signals, the UE comprising:
- multiple transmission antennas for transmitting uplink signals;
- a memory for storing codebooks of all ranks;
- and
- a processor connected to the multiple transmission antennas and the memory so as to process transmission of the uplink signals,
- wherein a Rank 2 codebook among the codebooks stored in the memory consists of a first type of
- [
- 1
- 0
- X
- 0
- 0
- 1
- 0
- Y
- ]
- ,
- a second type of
- [
- 1
- 0
- 0
- 1
- X
- 0
- 0
- Y
- ]
- ,
- and a third type of
- [
- 1
- 0
- 0
- 1
- 0
- Y
- X
- 0
- ]
- wherein ‘X’ and ‘Y’ are selected from among {1, j, −1, j}.
Dependencies are inferred from the claim text.