User selection method and device in multi-input multi-output system

A multi-input multi-output, user technology, applied in the direction of diversity/multi-antenna system, transmission system, digital transmission system, etc., to achieve the effect of reducing MSE value, reducing the complexity of exhaustive search, and improving the system bit error rate

Inactive Publication Date: 2010-10-06
THE PLA INFORMATION ENG UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a user selection method and device in a multiple-input multiple-output system, which solves the problem of how to select users when the co-channel interference is not completely eliminated

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  • User selection method and device in multi-input multi-output system

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] The implementation condition of the present invention is aimed at multiple users who simultaneously initiate communication needs in a multi-user MIMO system, and each user feeds back their respective channel state information to the base station, and the base station selects the simultaneous serving users through a certain user selection technology, and provides the information for all users. The selected user designs the corresponding precoding matrix and receiving filter matrix.

[0030] Taking the multi-user MIMO downlink as an example, the user selection process of the present invention is as follows: figure 1 shown, including the following steps:

[0031] Step 110: All users send their channel state information (CSI) to the base station;

[0032] The channel state information is obtained by the user through channel estimation on t...

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Abstract

The invention discloses a user selection method and a device in a multi-input multi-output system. The user selection method comprises the following steps that: a user in a multi-input multi-output system transmits CSI to a base station; the base station calculates an MSE value of the user through the obtained CSI which is fed back by each user, the user with the minimum MSE value is selected as a first selected user, or the user with the largest F normal value is selected as a first selected user according to the F normal value of each user; and the base station calculates sum of the MSE value of each user to be selected and the selected user in the user gather to be selected and selects the user with the minimum MSE sum value as a second selected user, and the like, and the selection ofthe user in the multi-input multi-output system is completed until the current sum of the selected user is equal to the quantity of the sending antenna or the user gather to be selected is empty. By utilizing the method, the problem on how to carry out the user selection when the common-channel interference is not completely eliminated can be solved.

Description

technical field [0001] The invention relates to a wireless communication system, in particular to a user selection method and device in a multiple-input multiple-output system. Background technique [0002] With the explosive growth of wireless access rates, the existing mobile networks cannot meet the demands of high transmission rates and high spectral efficiency in the future. The MIMO (Multiple Input Multiple Output) technology developed in the past ten years can double the capacity and spectrum utilization of the communication system without increasing the bandwidth. It is a smart antenna technology in the field of wireless mobile communication. major breakthrough. In recent years, with the development of MIMO technology, people have gradually shifted the research focus to multi-user MIMO, that is, using Space Division Multiple Access (SDMA) technology to send data to multiple users at the same time. Compared with traditional single-user MIMO, multi-user MIMO can grea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00H04B7/04
Inventor 崔维嘉季仲梅任修坤王丽
Owner THE PLA INFORMATION ENG UNIV
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