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User scheduling method for multiple-user multiple input multiple output (MU-MIMO) system downlink

A downlink, user scheduling technology, applied in electrical components, wireless communication, error prevention/detection through diversity reception, etc., can solve the problem of low throughput of MU-MIMO system, achieve diversity gain for most users, and improve throughput amount of effect

Inactive Publication Date: 2011-04-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0008] The main disadvantage of the above-mentioned existing MU-MIMO system user scheduling method is that the multi-user diversity gain cannot be fully utilized, resulting in low throughput of the MU-MIMO system

Method used

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  • User scheduling method for multiple-user multiple input multiple output (MU-MIMO) system downlink
  • User scheduling method for multiple-user multiple input multiple output (MU-MIMO) system downlink
  • User scheduling method for multiple-user multiple input multiple output (MU-MIMO) system downlink

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] When the specific implementation is introduced in detail, the basic knowledge of the embodiment is briefly introduced at the same time. Since this part of the content is based on the prior art, there is no detailed description, but this does not affect the common technology in this field. understanding and implementation of the invention.

[0021] as attached figure 1 As shown in the figure, the base station includes a scheduler and a precoder. All users (from user 1 to user X) covered by the base station estimate their respective channel matrices through pilots, and use the Frobenius norm to calculate the channel gain. According to the channel reciprocity in TDD mode, the base station can know the channel matrix and channel gain of all users, and use the scheduler to schedule the users for users to send data information, and then the s...

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Abstract

The invention relates to a user scheduling method for a multiple-user multiple input multiple output (MU-MIMO) system downlink, which comprises the following steps: 1, channel estimation is carried out by users according to a received pilot frequency data so as to acquire the current multiple input multiple output (MIMO) channel matrix of each user, each user respectively calculates a Frobenius numerical value of the MIMO channel matrix of the user, namely the MIMO channel gain of the user; 2, a base station acquires the MIMO channel matrix and the MIMO channel grain of each user side throughchannel reciprocity; 3, the base station schedules the user having the maximum MIMO channel grain as the first user to which the base station transmits according to the MIMO channel grain acquired from the users; and 4, the base station substitutes the MIMO channel matrixes of the scheduled user and the user not to be scheduled to a user scheduling function, calculates and selects the user corresponding to the maximum function value as the next scheduling user, and traverses all the users not be scheduled in sequence until the number of scheduled users reaches the design requirement of a basestation scheduler. The invention has the beneficial effects that the throughput of the MU-MIMO system is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a downlink user scheduling method of a multi-user multiple-input multiple-output (referred to as MU-MIMO) system. Background technique [0002] As we all know, multiple-input multiple-output (abbreviated as MIMO) technology has become one of the main technologies of future mobile communication due to its high spectrum utilization rate, good anti-multipath fading and anti-interference performance. Multi-User Multiple-Input Multiple-Output (referred to as MU-MIMO) system has attracted more and more attention because it can serve multiple users simultaneously while still maintaining the advantages of MIMO antenna systems. However, since multiple users in a multi-user MIMO system share the same time and frequency resources, multi-user co-channel interference (CCI for short) will inevitably be introduced, which will affect the reliable reception of data and ...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04W72/12
Inventor 杨阳方舒罗旬李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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