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Method for pilot symbol transmission in downlink MIMO system

A technology of downlink and pilot symbols, which is applied in the field of pilot symbol transmission in downlink MIMO systems, and can solve problems such as the impossibility of transmitting multiple data streams

Active Publication Date: 2015-07-22
LG ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the structure cannot be easily extended, it is not possible to transmit multiple data streams

Method used

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  • Method for pilot symbol transmission in downlink MIMO system
  • Method for pilot symbol transmission in downlink MIMO system
  • Method for pilot symbol transmission in downlink MIMO system

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Embodiment Construction

[0078] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. will understand that the attached Figure 1 The detailed description disclosed above is intended to describe exemplary embodiments of the invention and is not intended to describe the only embodiments in which the invention may be practiced. The following detailed description includes detailed matters in order to provide a full understanding of the invention. However, it will be apparent to those skilled in the art that the present invention can be carried out without the detailed matters. Wherever possible, the same reference numbers are used in the drawings to refer to the same or like parts.

[0079] In this specification, unless the text indicates otherwise, when an element refers to a component that "comprises", "comprises", or "has", another component is not excluded, but other components may be further included. Also, the terms "...unit", ...

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Abstract

The present invention relates to a method for transmitting a pilot signal in a downlink MIMO (Multi Input Multi Output) system that supports a first UE (User Equipment) supporting N number of transmission antennae out of a total of M transmission antennae and supports a second UE supporting said M (M>N) number of transmission antennae. Said method comprises a step wherein a pilot symbol is placed as an image in the resource block (RB) region on a subframe that enables the transmission of a user-specific pilot symbol to said second UE in a base station; and a step wherein the subframe whereon said pilot symbol has been placed as an image is transmitted, wherein said RB region includes a first region and a second region, and the first region and the second region each include a certain number of continuous OFDM symbols on a respective time axis, and on said first region is placed as an image a cell-specific pilot symbol with respect to the transmission antenna ports 0 to N-1 that can recognize both said first UE and said second UE, and on said second region is placed as an image a user-specific pilot symbol with respect to the transmission antenna ports 0 to M that can recognize said UE only.

Description

technical field [0001] The present invention relates to a method of efficiently providing a pilot signal in an environment where an antenna is added to an existing system in a Multiple Input Multiple Output (MIMO) communication system. Background technique [0002] LTE physical structure [0003] The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) supports radio frame structure type 1 applicable to frequency division duplex (FDD), and radio frame structure type 2 applicable to time division duplex (TDD). [0004] figure 1 Radio frame structure type 1 is shown. The radio frame structure type 1 consists of 10 subframes, each of which consists of two slots. [0005] figure 2 Radio frame structure type 2 is shown. Radio frame structure type 2 consists of two half frames, each half frame consists of five subframes, downlink pilot time slot (DwPTS), guard period (GP), and uplink pilot time slot (UpPTS) constitute. Each of these subframes consists of two...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04L27/26H04W48/12H04W16/24
CPCH04B7/0413H04W48/12H04L5/0037H04L5/0051H04L5/005H04L5/0023
Inventor 李文日韩承希具滋昊高贤秀郑载薰任彬哲
Owner LG ELECTRONICS INC
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