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Channel acquisition method, base station, user terminal, and large-scale antenna system

A technology of a user terminal and an acquisition method, which is applied in the field of channel acquisition and large-scale antenna systems, can solve problems such as the inability of large-scale antenna systems to work, increase system load, and reduce system transmission efficiency, so as to solve the problem of channel information acquisition and reduce complexity. degree of effect

Active Publication Date: 2018-02-23
CHINA TELECOM CORP LTD
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AI Technical Summary

Problems solved by technology

[0012] The application of large-scale antenna technology will lead to an increase in the number of resources occupied by the downlink reference signal and the amount of uplink feedback with the increase in the number of antenna ports, thereby increasing the load of the system and reducing the transmission efficiency of the system
When the number of antenna ports exceeds 128 or even higher, the increase in load will cause the large-scale antenna system to fail to work
In addition, the design of the codebook is also facing challenges. If the number of antenna ports in a large-scale antenna system is different, it will be too complicated and impractical to design the codebook one by one and provide feedback based on it.

Method used

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Embodiment Construction

[0079] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0080] The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0081] At the same time, it should be understood that, for the convenience of d...

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Abstract

The invention discloses a channel acquisition method, a base station, a user terminal, and a large-scale antenna system. The method comprises the following steps: grouping downlink antennas; acquiringphase information of downlink channels according to a quantized feedback of the user terminal for partial or all antenna subgroup channels; acquiring amplitude information of the downlink channels according to an uplink reference signal; and reconstructing downlink channel information according to the phase information and the amplitude information. The channel acquisition method provided by theinvention effectively controls the system cost of acquiring the channel information in a multi-antenna system, reduces the complexity of the implementation, and solves the problem of channel information acquisition of the large-scale antenna system.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a channel acquisition method, a base station, a user terminal and a large-scale antenna system. Background technique [0002] Multiple-input multiple-output (MIMO) technology with multiple antenna space resources has become the core technology of mainstream wireless communication standards such as 3GPP LTE-A due to its great potential in improving the reliability and speed of wireless communication transmission. How to make full use of resources in the spatial dimension without significantly increasing the complexity of the user's mobile terminal equipment is a common research hotspot in the current academic and industrial circles. Generally speaking, in order to match the data stream sent downlink to a direction with better spatial channel characteristics, the base station (eNB) needs to perform precoding according to downlink channel information. In addition, the downlink...

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Application Information

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IPC IPC(8): H04B7/0413H04B7/0417H04B7/0456
CPCH04B7/0417
Inventor 韩斌陈鹏杨峰义毕奇
Owner CHINA TELECOM CORP LTD
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