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Method and device for forming codebook, base station and mobile station

A technology for mobile stations and codebooks, which is applied to base stations and mobile stations to form codebooks, which can solve the problems of increasing the complexity of hardware devices and increasing the size of codebooks, and achieve the effect of reducing overhead

Active Publication Date: 2022-02-11
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this leads to an increase in the implementation complexity of the hardware devices in the system and an increase in the size of the codebook while improving the beam resolution

Method used

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  • Method and device for forming codebook, base station and mobile station
  • Method and device for forming codebook, base station and mobile station
  • Method and device for forming codebook, base station and mobile station

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Embodiment Construction

[0023] A method and apparatus for forming a codebook for a MIMO antenna array, a base station and a mobile station according to an embodiment of the present invention will be described below with reference to the accompanying drawings. In the drawings, like reference numerals denote like elements throughout. It should be understood that the embodiments described herein are illustrative only and should not be construed as limiting the scope of the present invention. In addition, the UE described here may include various types of user terminals, such as mobile terminals (or referred to as mobile stations) or fixed terminals, however, for convenience, UE and mobile stations are sometimes used interchangeably hereinafter.

[0024] Embodiments of the present invention improve the codebook used in the MIMO system and the process of selecting beams from beam sequences generated by the MIMO system. Hereinafter, embodiments of the present invention will be described with reference to ...

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Abstract

Embodiments of the present invention provide a method for forming a codebook and an apparatus thereof, a base station and a mobile station. A method for forming a codebook according to an embodiment of the present invention includes: forming a first main codebook according to a first phase shift parameter, wherein the first main codebook is used to generate a first basic beam sequence in a first spatial dimension; determining a first rotation parameter, wherein the first rotation parameter is used to perform phase rotation on the first basic beam sequence to generate a first auxiliary beam sequence in the first spatial dimension; the first main codebook and the first rotation parameter are used to form a first Spatial dimension codebook.

Description

technical field [0001] The present invention relates to the field of wireless communication, and specifically relates to a method for forming a codebook and its device, a base station and a mobile station that can be used in a wireless communication system. Background technique [0002] Full Dimensional MIMO (FD-MIMO) and Massive MIMO antennas have been standardized since LTE (Long Term Evolution) Release 13 researched by 3GPP (Third Generation Partnership Project). Compared with the traditional MIMO system, in the FD-MIMO system and the massive MIMO system, when the data of the mobile station increases, the base station can use more antennas for data transmission to improve the system throughput. [0003] However, the size of the codebook required by the FD-MIMO system and the massive MIMO system and the complexity of hardware equipment also increase significantly with the increase in the number of system antennas and the number of beams that can be formed. In addition, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456
CPCH04B7/04
Inventor 侯晓林刘敏王新蒋惠玲吴伟刘丹谱
Owner NTT DOCOMO INC