Nova Patents
EP2420006B1

Uplink signal transmission and reception using optimized rank 3 codebook

Abstract

This record has no abstract on file.

EP2420006B1, drawing sheet 1
Sheet 1 of 201

Term

3.6 yearsleft in the term

Expires 13 April 2030.

  1. Priority
  2. Filed
  3. Granted
  4. Today
  5. Expires

6 claims: 4 independent, 2 dependent

  1. 1
    A method for controlling a user equipment (UE) to transmit uplink signals via four antennas (1405), the method comprising:mapping the uplink signals to three layers;performing Discrete Fourier Transform, DFT, spreading upon each of signals of the three layers;precoding the three DFT-spread layer signals using a specific precoding matrix selected from a codebook;generating a Single Carrier - Frequency Division Multiple Access, SC-FDMA, symbol upon the precoded signals;and transmitting the SC-FDMA symbol to a base station (BS) via the four antennas, wherein the codebook consists of precoding matrix groups of 1 0 0 X 0 0 0 1 0 0 0 1 , 1 0 0 0 1 0 X 0 0 0 0 1 , 1 0 0 0 1 0 0 0 1 X 0 0 , 0 1 0 1 0 0 0 0 1 X 0 0 , 0 1 0 1 0 0 X 0 0 0 0 1 , and 0 1 0 0 0 1 1 0 0 X 0 0 , and satisfied with a condition of X∈{1, -1}, and wherein each of the precoding matrix groups includes two precoding matrices having different X value respectively.
  2. 3
    A user equipment (UE) for transmitting uplink signals via multiple antennas (1405) comprising:four antennas for transmitting and receiving signals;a memory (22) for storing a codebook ;and a processor (21) connected to the multiple antennas and the memory so as to process the uplink signals, wherein the processor includes: a layer mapper (1401) for mapping the uplink signals to the three layers;a Discrete Fourier Transform, DFT, module (1402) for performing DFT spreading upon each of the three layer signals;a precoder (1403) for precoding the three DFT-spread layer signals received from the DFT module using a specific precoding matrix selected from the codebook stored in the memory;and a transmission module for generating a Single Carrier - Frequency Division Multiple Access, SC-FDMA, symbol upon the precoded signals, and transmitting the SC-FDMA symbol to a base station (BS) via the four antennas, wherein the codebook consists of precoding matrix groups of 1 0 0 X 0 0 0 1 0 0 0 1 , 1 0 0 0 1 0 X 0 0 0 0 1 , 1 0 0 0 1 0 0 0 1 X 0 0 , 0 1 0 1 0 0 X 0 0 0 0 1 , 0 1 0 1 0 0 0 0 1 X 0 0 , and 0 1 0 0 0 1 1 0 0 X 0 0 , and satisfied with a condition of X∈{1, -1}, and wherein each of the precoding matrix groups includes two precoding matrices having different X value respectively.
  3. 5
    A method for controlling a base station (BS) to receive uplink signals of a user equipment (UE), the method comprising:receiving signals having been transmitted via four antennas (1405) and three layers from the user equipment (UE);and processing the received signals using a specific precoding matrix selected from a codebook, wherein the codebook consists of precoding matrix groups of 1 0 0 X 0 0 0 1 0 0 0 1 , 1 0 0 0 1 0 X 0 0 0 0 1 , 1 0 0 0 1 0 0 0 1 X 0 0 , 0 1 0 1 0 0 X 0 0 0 0 1 , 0 1 0 1 0 0 0 0 1 X 0 0 , and 0 1 0 0 0 1 1 0 0 X 0 0 , and satisfied with a condition of X∈{1, -1}, and wherein each of the precoding matrix groups includes two precoding matrices having different X value respectively.
  4. 6
    A base station (BS) for receiving uplink signals of a user equipment, UE, comprising:an antenna for transmitting and receiving signals;wherein received signals have been transmitted via four antennas and three layers from the UE;30 a memory (12) for storing a codebook and a processor (11) connected to the antenna and the memory so as to process the received signals, wherein the processor is configured to process the received signals using a specific precoding matrix selected from the codebook stored in the memory, wherein the codebook consists of precoding matrix groups of 1 0 0 X 0 0 0 1 0 0 0 1 , 1 0 0 0 1 0 X 0 0 0 0 1 , 1 0 0 0 1 0 0 0 1 X 0 0 , 0 1 0 1 0 0 X 0 0 0 0 1 , 0 1 0 1 0 0 0 0 1 X 0 0 , and 0 1 0 0 0 1 1 0 0 X 0 0 , and satisfied with a condition of X∈{1, -1}, and wherein each of the precoding matrix groups includes two precoding matrices having different X value respectively.
Independent claims4