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Robust pre-coding method based on user fairness in multi-cell multi-user system

A technology of multi-cell multi-user and coding method, applied in the field of wireless communication, can solve the problems of error robust transmission, difficult to obtain channel state information, etc.

Inactive Publication Date: 2014-03-26
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0006] However, in the actual system, it is difficult to obtain the ideal channel state information (Channel State Information, CSI), and it is necessary to consider the robust transmission of CSI errors

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  • Robust pre-coding method based on user fairness in multi-cell multi-user system
  • Robust pre-coding method based on user fairness in multi-cell multi-user system
  • Robust pre-coding method based on user fairness in multi-cell multi-user system

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0045] The precoding method based on user fairness in the multi-cell multi-user system disclosed in the present invention considers user fairness and the power limitation of each base station, and minimizes the maximum MSE of the multi-cell multi-user system with bounded error in channel information as To optimize the objective, construct a cost function according to the leakage criterion, convert the Min-Max MSE problem of multiple cells into a Min-Max MSE sub-problem corresponding to each base st...

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Abstract

The invention provides a robust pre-coding method based on user fairness in a multi-cell multi-user system. The method comprises the following steps that system parameters are set; MSEsk is defined to be the MSE of a k user in an m cell; the MSE of the k user in the m cell is defined when bounded errors exist in a channel; parameter defining is carried out; under the situation that bounded errors exist in channel information, a cost function is used for correcting the MSE; and a slack variable is introduced, and a subproblem with the existing bounded errors is converted into a GEVP problem to be solved. According to the method, influence from the bounded errors can be effectively handled, the fairness of users is guaranteed, feedback expenditure is lowered through a distributed algorithm, and good bit-error-rate performance is obtained.

Description

technical field [0001] The present invention relates to a method in the technical field of wireless communication, in particular to a robust precoding method based on user fairness in a multi-cell multi-user system. Background technique [0002] In recent years, with the rapid development of wireless communication technology, the requirements of large traffic volume, high speed and high spectral efficiency of wireless communication have become increasingly urgent. In the next generation wireless communication system, the frequency reuse factor is 1, and there is serious inter-cell interference (Inter-Cell Interference, ICI). As a key technology to suppress ICI, a multi-cell communication system in which multiple base stations cooperate with each other has become one of the research hotspots. According to the degree of base station cooperation, it is divided into joint processing (Joint Processing, JP) and coordinated beam forming (Coordinated Beamforming, CBF). In JP mode,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
Inventor 李从改何晨蒋铃鸽
Owner SHANGHAI JIAO TONG UNIV
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