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Codebook generation method and device and pre-coding indication information transmission method and device

A precoding matrix and codebook technology, applied in the field of codebook generation method and transmission precoding indication information, can solve the problem that the codebook structure cannot meet the feedback overhead and the like

Active Publication Date: 2017-06-16
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a codebook generation method and a method and device for transmitting precoding indication information, which are used to solve the problem that the existing codebook structure cannot meet the requirements of feedback overhead

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  • Codebook generation method and device and pre-coding indication information transmission method and device

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Embodiment Construction

[0092] The embodiment of the present invention provides a codebook down-sampling scheme, and the obtained codebook covers evenly in the beam direction, and the feedback overhead can be reduced by using the codebook generated in the embodiment of the present invention for feedback.

[0093] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention.

[0094] Embodiment 1 of the present invention provides a codebook generation method, such as figure 1 As shown, the method includes:

[0095]S11. Uniformly sample the first dimension index and the second dimension index of the precoding matrix included in the preset codebook to obtain S first dimension indexes and S second dimension indexes, wherein S is the maximum feedback allowed by the system The numb...

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Abstract

An embodiment of the invention relates to a codebook generation method and device and a pre-coding indication information transmission method and device, which are used for solving the problem that an existing codebook structure cannot meet feedback overhead requirements. The codebook generation method comprises the following steps: carrying out uniform sampling on a first dimension index and a second dimension index of a precoding matrix included in a preset codebook to obtain S first dimension indexes and S second dimension indexes, wherein S is determined according to system allowed maximum feedback bit number, and S is an integer larger than or equal to 1; and determining a codebook formed by precoding matrixes corresponding to the S first dimension indexes and the S second dimension indexes as a final codebook, and re-allocating first dimension indexes and second dimension indexes for the precoding matrixes in the final codebook.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a codebook generation method and a method and device for transmitting precoding indication information. Background technique [0002] In the current Frequency Division Duplex (FDD) Long Term Evolution (LTE) system, the acquisition of downlink channel state information (Channel State Information, CSI) requires a user equipment (UE) to use a downlink reference signal ( For example, Channel State Information-Reference Signals (CSI-RS) and Cell-specific Reference Signals (CRS) estimate the downlink channel and feed back Rank Indication (RI), precoding The matrix indicator (Precoding Matrix Indicator, PMI) and the channel quality indicator (Channel Quality Indicator, CQI) are sent to the evolved base station (eNB) side. When the UE reports the CSI, it may adopt two methods of periodic reporting or aperiodic reporting. Among them, the feedback resources are limited, ...

Claims

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Application Information

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IPC IPC(8): H04B7/0456
CPCH04B7/0456
Inventor 李辉高秋彬陈润华陈文洪拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD