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Channel feedback and precoding method, base station, user terminal and system

A user terminal and channel feedback technology, which is applied in the field of wireless communication, can solve problems such as increasing system load, reducing system transmission efficiency, and large-scale antenna systems cannot work, so as to reduce inter-cell interference and improve performance

Active Publication Date: 2020-06-05
CHINA TELECOM CORP LTD
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  • Claims
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Problems solved by technology

[0005] On the one hand, 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

Method used

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  • Channel feedback and precoding method, base station, user terminal and system
  • Channel feedback and precoding method, base station, user terminal and system
  • Channel feedback and precoding method, base station, user terminal and system

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Embodiment Construction

[0073] 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.

[0074] 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.

[0075] At the same time, it should be understood that, for the convenience of d...

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Abstract

The invention discloses a channel feedback and precoding method, a base station, a user terminal and a system. The method comprises the following steps: obtaining channel statistical characteristics;grouping user terminals according to the channel statistical characteristics, and calculating outer ring precoding; sending reference signals subjected to outer ring precoding beamforming to the userterminals; and calculating inner ring precoding according to equivalent channel information fed back by the user terminals. According to the channel feedback and precoding method disclosed by the invention, the inter-cell interference is adaptively eliminated via the outer ring precoding, and MU-MIMO transmission is accomplished via the inner ring precoding, thereby effectively reducing the downlink pilot frequency cost and the uplink feedback quantity of the system, solving the feedback problem of the FDD large-scale antenna system, solving the inter-cell interference problem of the FDD large-scale antenna system, effectively using the spatial degree of freedom and improving the performance of the system.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a channel feedback and precoding 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 space dimension without significantly increasing the complexity of user terminals and base station 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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/0456H04B7/06
CPCH04B7/0413H04B7/0456H04B7/0619
Inventor 韩斌梁林蒋峥陈鹏
Owner CHINA TELECOM CORP LTD
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