Method and apparatus for transmitting uplink signals using multi-antenna

摘要

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.

主权项

1. A method for controlling a user equipment (UE) to transmit uplink signals via multiple transmission antennas, the method comprising:
mapping the uplink signals to a predetermined number of layers; performing, after the mapping, Discrete Fourier Transform (DFT) spreading for each of the predetermined number of layers; precoding each of the DFT-spread layers using a specific precoding matrix selected from a codebook to produce precoded signals, wherein the codebook comprises a plurality of precoding matrixes for uplink transmission, wherein every precoding matrix of the plurality of matrixes is established in a manner to permit each one of rows of the precoding matrix, corresponding to each one of the multiple transmission antennas to transmit no more than one layer of the DFT-spread layers; and transmitting the precoded signals to a base station (BS) via the multiple transmission antennas by performing a process for constructing a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol upon the precoded signals.