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Channel state information quantification method

A technology of channel state information and quantization method, which is applied in the field of channel state information quantification, and can solve problems such as quantization complexity that cannot be directly implemented

Active Publication Date: 2016-10-26
CHINA THREE GORGES UNIV
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Problems solved by technology

However, since the structure of DFT-based KPC is no longer a simple PSK structure or QAM structure, the above-mentioned quantization method using the special structure of the signal for low-complexity sequence detection to reduce the quantization complexity cannot be directly implemented. We need to modify the original quantization / The detection method has been extended and innovated

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Embodiment Construction

[0047] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0048] The present invention is implemented in an FD-MIMO system, adopts a uniform planar antenna array UPA, and sets the number of transmitting antenna ports to 64, wherein the number of ports in the horizontal dimension is 8, and the number of ports in the vertical dimension is 8. The feedback method adopts limited feedback, that is, after the user end measures the channel, it feeds back the quantization codebook that best matches the real channel to the base station end. The base station adopts a precoding method based on a codebook.

[0049] figure 1 A flow chart of the channel state information quantification method of the present invention is shown, and the channel state information quantification method of the present invention includes the following steps:

[0050] S101: Decompose the channel vector into horizontal and vertical sub-v...

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Abstract

The invention discloses a channel state information quantification method. The method includes the following steps that: a 3D channel is decomposed into two sub channels; CSI (channel state information) quantification is carried out on the two sub channels respectively based on a Kronecker product codebook according to the equivalence of incoherent sequence receiving and CSI quantification; and code words obtained after the quantification of the two sub channels are multiplied, so that a final CSI quantification result can be obtained. According to the quantification method of the invention, FD-MIMO channel information quantification is converted into the receiving problem of two incoherent sequences with parallel linear complexity according to the equivalence relation of incoherent sequence receiving and channel information quantification and the decomposability feature of the Kronecker product codebook, and therefore, quantification complexity can be greatly decreased.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for quantifying channel state information. Background technique [0002] In order to further improve the spectral efficiency of Multiple-Input Multiple-Output (MIMO) technology, a full-latitude Multiple-Input Multiple-Output FD-MIMO (full dimension MIMO) technology that utilizes both horizontal and vertical spatial degrees of freedom is proposed. FD-MIMO adopts a large-scale 2D active antenna array AAS (Active Antenna Array), which can use the spatial isolation to provide services for a large number of mobile terminals at the same time at the same frequency, thus greatly improving the system capacity. In addition, 2D AAS can make full use of the vertical The realization of 3D beamforming with three-dimensional spatial freedom greatly improves the system coverage. Because FD-MIMO technology has considerable gains in system coverage and capacity, and the development ...

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Application Information

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IPC IPC(8): H04B7/06H04B7/04
CPCH04B7/0456H04B7/0626H04B7/0663
Inventor 曾菊玲蒋砺思丁健
Owner CHINA THREE GORGES UNIV
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