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Cooperative beam-forming and power control method for large-scale antenna multi-cell system

A technology of cooperative beamforming and large-scale antenna, applied in the field of communication, can solve the problem of less research and other problems

Inactive Publication Date: 2018-08-24
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In contrast, another optimization problem, maximizing the user's SINR under power constraints, is less studied

Method used

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  • Cooperative beam-forming and power control method for large-scale antenna multi-cell system
  • Cooperative beam-forming and power control method for large-scale antenna multi-cell system
  • Cooperative beam-forming and power control method for large-scale antenna multi-cell system

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Embodiment Construction

[0020] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] The embodiment of the present invention is realized based on the following system model:

[0022] Consider a downlink massive MIMO system consisting of L cells. Each base station is equipped with N antennas and associated with Kj,k As follows:

[0023]

[0024] Among them, h l,j,k Indicates the channel vector from base station l to user k in cell j, g j,k is the beamforming vector of user k in cell j, s j,k is the information signal of user k in cell j, is additive white Gaussian noise. The SINR of user k in cell j can be obtained from formula (1):

[0025]

[0026] Will Substitute into the above formula, where p j,k is the transmission power, u j,...

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Abstract

The invention provides a cooperative beam-forming and power control method for a large-scale antenna multi-cell system. The method comprises the steps of: acquiring a downlink beam-forming parameter and a power allocation parameter of each user in the large-scale antenna multi-cell system according to the maximum signal to interference and noise ratio and the constraint condition of a total powerlimitation; and performing cooperative beam-forming and power control on a downlink of each user in the large-scale antenna multi-cell system according to the beam-forming parameter and the power allocation parameter to maximize the minimum values of the signal to interference and noise ratios of all users. According to the method, the Perron-Frobenius theory is applied to the large-scale antennamulti-cell system, and cooperative beam-forming and power control are performed on the downlink according to the calculated beam-forming parameter and power allocation parameter, so that the minimum values of the signal to interference and noise ratios of all the users can be maximized under the condition of guaranteeing the total power limitation, and the quality of service for the users is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, and more specifically, to a method for coordinated beamforming and power control of a large-scale antenna multi-cell system. Background technique [0002] MIMO technology refers to the technology of using multiple transmit and multiple receive antennas for space diversity. It uses discrete multiple antennas, which can effectively decompose the communication link into many parallel sub-channels, thereby greatly improving the capacity. Information theory has proved that when different receiving antennas and different transmitting antennas are not correlated with each other, the MIMO system can well improve the anti-fading and noise performance of the system, thereby obtaining huge capacity. In a wireless channel with limited power bandwidth, MIMO technology is a space diversity technology to achieve high data rate, increase system capacity, and improve transmission quality. [0003]...

Claims

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Application Information

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IPC IPC(8): H04W52/14H04W52/24H04W52/30H04W72/04
CPCH04W52/143H04W52/24H04W52/30H04W72/046H04W72/0473
Inventor 俎云霄邵林侯宾李巍海孙森陈静
Owner BEIJING UNIV OF POSTS & TELECOMM