Method for transmitting data in multiple antenna system

• US 8,532,217 B2
• Filed: 05/02/2012
• Issued: 09/10/2013
• Est. Priority Date: 07/30/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ko, Hyun Soo, Chun, Jin Young, Lee, Moon Il, Ihm, Bin Chul, Lee, Wook Bong
• Primary Examiner(s): Lugo, David B.
• Application Number:
  US13/462,731
• Publication Number:
  US 20120213310A1
• Time in Patent Office: 496 Days
• Field of Search: 375/260, 375/267, 375/296, 375/299
• US Class Current: 375/267
• CPC Class Codes: H04B 7/0413 MIMO systems

Abstract

A method of sending data in a multiple antenna system includes the steps of generating a transmission signal by applying channel-dependent precoding to a first antenna cluster and a second antenna cluster, each comprising a plurality of antennas, wherein the channel-dependent precoding is performed by a precoding weight matrix in which a precoding weight for each of the antenna clusters has a block diagonal form and the precoding weight is represented by P×V for a number of transmission antennas P, included in each of the antenna clusters, and a number of layers V applied to each of the antenna clusters (P and V are an integer greater than 0) and sending the transmission signal.

Claims

1. A method for transmitting a signal in a multiple antenna system, the method performed by a transmitter and comprising:

pre-coding the signal based on a codebook that includes first pre-coding matrices; and

transmitting the pre-coded signal using a radio resource,

wherein each of the first pre-coding matrices is decomposed into a diagonal matrix and a unitary matrix,

wherein the diagonal matrix is configured in a form of

2. The method of claim 1, wherein the unitary matrix comprises a weight factor that is determined such that a transmit power of each antenna is normalized.

3. The method of claim 1, wherein the radio resource comprises at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol.

4. A transmitter comprising:

a pre-coder for pre-coding a signal based on a codebook that includes first pre-coding matrices; and

a transmitter for transmitting the pre-coded signal using a radio resource,

wherein each of the first pre-coding matrices is decomposed into a diagonal matrix and a unitary matrix,

wherein the diagonal matrix is configured in a form of

5. The transmitter of claim 4, wherein the unitary matrix comprises a weight factor that is determined such that a transmit power of the first number of antennas is normalized.

6. The transmitter of claim 4, wherein the radio resource comprises at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol.