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A Method for Optimizing Energy Efficiency in a Multi-User MIMO Distributed Base Station System

A technology of distributed base stations and optimization methods, applied in diversity/multi-antenna systems, transmission systems, radio transmission systems, etc.

Active Publication Date: 2020-06-30
白盒子(上海)微电子科技有限公司
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Problems solved by technology

[0003] Purpose of the invention: The purpose of the present invention is to provide a method for optimizing energy efficiency in a multi-user MIMO distributed antenna system for the deficiencies in the prior art. On the one hand, this method solves the problem of user selection under limited system resources, and also It is to eliminate some users so that the system can work; on the other hand, under the given selection of users, a low-complexity algorithm for jointly solving the precoding matrix and link selection is given

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  • A Method for Optimizing Energy Efficiency in a Multi-User MIMO Distributed Base Station System

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[0073] The present invention will be further described below in conjunction with the accompanying drawings.

[0074] We consider a multi-user MIMO distributed base station system such as figure 1 As shown, there are I remote access points in the downlink multi-user distributed base station of the system, each remote access point is configured with M antennas, and each user is configured with N antennas, i=1, 2, ..., I . When the number of distributed access points is less than 6, the position of the jth access point is (r cos(2π(j-1) / I)), r sin(2π(j-1) / I)), j =1,2,...,I, where r=2R sin(π / I) / (3πI), otherwise the first access point is located at the center of the cell (0,0), and the other I-1 access points are located at ( r cos(2π(j-1) / (I-1))), r sin(2π(j-1) / (I-1))), j=2, . . . , I.

[0075] The method comprises the steps of:

[0076] Step 1. First consider the user access problem. Specifically, given the power constraints of each distributed access point, the system maxim...

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Abstract

The invention presents an energy efficiency optimization method in a multi-user MIMO distributed base station system, wherein the method includes steps of giving a maximum user selection algorithm which can be supported by the system under the sending power limit of a base station and requirement of user rate, wherein the algorithm can find out the maximum user set supported by the system; and then presenting a new energy efficiency maximization algorithm with low complexity, wherein the complexity considers about the selection of a leading end chain at the same time; at last, acquiring a design scheme of sending pre-coding of the base station. The method can solve the problem of sending pre-coding design of the base station in a multi-user MIMO distributed base station system while reasonably carry out the front leading link selection, thus the energy efficiency of the system is the maximum, and the system can be rapidly converged to the optimal solution.

Description

technical field [0001] The invention relates to the field of network technology in mobile communication systems, in particular to a method for optimizing energy efficiency in a multi-user MIMO distributed base station system. Background technique [0002] Since the distributed base station system can greatly improve the system spectrum efficiency, broaden the coverage of the wireless network and improve the reliability of the link, the distributed system has been considered as the main architecture of the next generation mobile network. At present, there is no literature on energy efficiency in multi-user MIMO distributed systems, mainly because the optimization problem is difficult to solve. Contents of the invention [0003] Purpose of the invention: The purpose of the present invention is to provide a method for optimizing energy efficiency in a multi-user MIMO distributed antenna system for the deficiencies in the prior art. On the one hand, this method solves the prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/0452H04B7/024H04W52/26H04W52/34H04W52/42
CPCH04B7/024H04B7/0452H04B7/0456H04W52/265H04W52/267H04W52/346H04W52/42
Inventor 刘楠任红
Owner 白盒子(上海)微电子科技有限公司
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