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Method and device for feeding back channel state information

A state information, feedback channel technology, applied in the field of communication network, can solve the problem of inapplicability

Active Publication Date: 2016-03-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when using the existing technology to feed back channel state information, the DFT codeword of ULA only involves one dimension in the horizontal direction, and only a single-layer codeword technology is used. When the antenna array is multi-dimensional and the codeword vector is multi-dimensional, Existing technology does not apply

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  • Method and device for feeding back channel state information
  • Method and device for feeding back channel state information

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Embodiment 1

[0027] An embodiment of the present invention provides a method for feeding back channel state information, such as figure 1 As shown, the method includes:

[0028] Step 101: Determine the second group of orthogonal basis vectors and the group number of the second group of orthogonal basis vectors according to the predefined first group of basis vectors, each basis vector of the first group of basis vectors is horizontal, The Kronecker product of the basis vectors corresponding to at least two directions in the vertical direction and the polarization direction;

[0029] Step 102, according to the second orthogonal basis vector group, determine the third basis vector group corresponding to each data layer, in the third basis vector group corresponding to each data layer, there is at least one set of the third basis vector group The number of vectors is greater than 1;

[0030] Specifically, determine the basis vector quantity K(i) of the third basis vector group corresponding...

Embodiment 2

[0050] An embodiment of the present invention provides a method for feeding back channel state information, such as image 3 As shown, the method includes:

[0051] Step 301: Determine the second group of orthogonal basis vectors and the group number of the second group of orthogonal basis vectors according to the predefined first group of basis vectors, each basis vector of the first group of basis vectors is horizontal, The Kronecker product of the basis vectors corresponding to at least two directions in the vertical direction and the polarization direction;

[0052] The predefined set of first basis vectors is C 1 ={f 1 ,f 2 ,...,f B}, where B is the total amount of beams, B=B a ×B p ×B e , B≥N T , N T is the number of antennas in the antenna array. The basis vectors of the first basis vector group are constructed by the Kronecker product from the azimuth component (azimuth), the polarization direction component (polar) and the vertical direction component (eleva...

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Abstract

The invention discloses a method and device for feeding back channel state information, which relate to the technical field of communication networks. In the solution provided by the embodiment of the present invention, the second orthogonal basis vector group and the group number of the second orthogonal basis vector group are determined according to the predefined first basis vector group, and the second orthogonal basis vector group is determined according to the second orthogonal basis vector group. , determine the third basis vector group corresponding to each data layer, and then calculate the second-level codeword of each data layer respectively, and calculate the group number of the second orthogonal basis vector group and the third basis vector corresponding to each data layer. The group and the second-level codewords corresponding to the respective data layers are sent to the base station so that the base station can synthesize the multi-layered codewords. The solutions provided by the embodiments of the present invention are suitable for feeding back channel state information.

Description

technical field [0001] The invention relates to the technical field of communication networks, in particular to a method and device for feeding back channel state information. Background technique [0002] MIMO (Multiple Input Multiple Output) technology is one of the most important technologies to improve the spectral efficiency of wireless systems. In MIMO systems, usually the transmitting end can only obtain better transmission results when the channel is known. In FDD (Frequency Division Duplexing, frequency division duplexing ) system, usually the receiving end feeds back the channel state information to the transmitting end, therefore, which method to use to feed back the channel state information is a hot spot in standard design. [0003] When feeding back channel state information in the prior art, firstly, the channel feature vector is quantized by weighted combination of multiple DFT (DiscreteFourierTransform, Discrete Fourier Transform) codebooks, and then the fir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04L1/18H04L1/06H04L1/00
CPCH04B7/0626H04B7/063H04B7/0639H04B7/10H04L27/2601
Inventor 田春长伍勇
Owner HUAWEI TECH CO LTD
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