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A user selection method for multi-user mimo system based on quantization precoding

A system user and multi-user technology, applied in the field of user selection of multi-user MIMO systems based on quantization precoding, can solve the problems of low system capacity and no consideration of user fairness, and achieve the effect of ensuring system and capacity and improving fairness

Inactive Publication Date: 2019-02-15
HEBEI UNIV OF TECH
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Problems solved by technology

This selection method improves the capacity of the system while ensuring fairness among users, and overcomes the shortcomings of the existing user selection method that minimizes the correlation of precoding matrixes with low system capacity and does not consider user fairness

Method used

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  • A user selection method for multi-user mimo system based on quantization precoding
  • A user selection method for multi-user mimo system based on quantization precoding
  • A user selection method for multi-user mimo system based on quantization precoding

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Embodiment

[0067] Set 10 single-antenna users in the cell, and each user selects its own optimal precoding vector and calculates channel quality information according to the existing method, and feeds back the precoding vector index and channel quality information to the base station. The base station selects 4 users to serve at the same time according to the feedback information, and realizes 100 user scheduling.

[0068] This embodiment is based on the quantitative precoding MU-MIMO system user selection method, the steps of which are:

[0069] In the first step, the base station obtains the precoding matrix index (PMI) and channel quality information (CQI) fed back by the user terminal according to the existing method, and then obtains the user set Ω to be selected by calculating the precoding matrix correlation of the user set .

[0070] which is:

[0071]

[0072] Among them, K=4 is the number of users served at the same time, M=10 is the number of users in the cell, S i is th...

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Abstract

The invention discloses a multi-user MIMO system user selection method based on quantitative precoding.The multi-user MIMO system user selection method includes the following steps that firstly, base station sides obtain precoding vector index (PMI) and channel quality information (CQI) fed back by client-sides according to an existing method and then obtain user sets to be selected Omega calculating the relevance of precoding matrixes of the user sets; secondly, the base station sides calculate the sum capacities of the user sets to be selected Si <= Omega according to the channel quality information (CQI) and obtain maximum calculation sum capacities; thirdly, the base station sides calculate normalization sum capacities of the user sets to be selected Si <= Omega and normalized user scheduling times according to the sum capacities of the user sets and user scheduling times; finally, the base station sides calculate scheduling identification bits of the user sets to be selected according to the normalization sum capacities and the normalized user scheduling times and then select one group of ideal user sets according to the user scheduling identification bits for service.

Description

technical field [0001] The invention relates to the field of wireless communication networks, in particular to a quantization precoding-based multi-user MIMO system user selection method. Background technique [0002] In order to meet the rapid growth of wireless communication data transmission demand in the future, research on 5G requirements and candidate key technologies has become a research hotspot at home and abroad. Among them, the Massive MIMO (Massive MIMO) technology, one of the key technologies, can further tap the wireless resources in the space dimension and improve the spectrum efficiency and energy efficiency of the wireless system. Compared with the single-user system, the multi-user MIMO (MU-MIMO) system increases the concept of spatial dimension, thus further improving the system capacity. [0003] The system capacity domain is defined as a collection of velocity vectors that can be reached simultaneously, and is often used to measure the ability of a syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0452H04B7/06
CPCH04B7/0452H04B7/0456H04B7/0617H04B7/0626H04B7/0632
Inventor 刘剑飞陶颖曾祥烨卢嘉王蒙军
Owner HEBEI UNIV OF TECH
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