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Uplink precoding method in 2 -Tx system

A technology of precoding and precoding matrix, which is applied in the field of enabling base stations to effectively receive and transmit signals, so as to prevent deterioration and reduce signaling overhead.

Active Publication Date: 2012-01-11
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the precoding scheme needs to be properly designed in consideration of antenna setup, channel configuration, system structure, etc.

Method used

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  • Uplink precoding method in 2 -Tx system
  • Uplink precoding method in 2 -Tx system
  • Uplink precoding method in 2 -Tx system

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Embodiment Construction

[0032] Reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings that illustrate the invention. In the following detailed description of the invention, details are included to facilitate a full understanding of the invention. It will be apparent, however, to those skilled in the art that the present invention may be practiced without these details.

[0033] Occasionally, to prevent the present invention from being obscured, well-known structures and / or devices are skipped, or may be represented as block diagrams focusing on the core functions of the structures and / or devices. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0034] As mentioned in the previous description, a codebook for uplink precoding is proposed in the following description, and more specifically, a codebook for enabling the user equipment to be config...

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Abstract

A method for a user equipment to precode and transmit an uplink signal efficiently in a 2 -antenna system and a method for a base station to receive the transmitted signal efficiently are disclosed. A 2 -antenna codebook includes 4 DFT matrixes and 2 antenna selection matrixes for a rank 1 and one identity matrix for a rank 2 as precoding matrixes. For efficient uplink signal transmission / reception, the present invention provides signal transceiving technology between user equipment and base station using the 2 -antenna codebook.

Description

[0001] Background of the invention technical field [0002] The present invention relates to a technique for transmitting / receiving a signal by precoding in a mobile communication system, and more particularly, to a method for enabling a user equipment to precode and transmit an uplink signal efficiently in a 2-antenna system and to use A method by which a base station efficiently receives transmitted signals. Background technique [0003] In multi-antenna or MIMO systems, precoding provides high peak / average system throughput by providing beamforming gain and diversity gain to the transmit / receive side. However, the precoding scheme needs to be properly designed in consideration of antenna settings, channel configuration, system structure, and the like. [0004] Typically, MIMO systems perform precoding to minimize complexity and control signaling overhead using a codebook-based precoding scheme. In this case, the codebook includes a prescribed number of precoding vector...

Claims

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Application Information

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IPC IPC(8): H04B7/04
CPCH04W52/367H04L27/2601H04B7/0608H04B7/0465H04B7/0473H04B7/063H04B7/0639H04B7/0486H04B7/0634
Inventor 李文一郑载薰高贤秀韩承希
Owner LG ELECTRONICS INC
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