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An optimization method for mimo transmission power allocation based on robust design

A transmission power and allocation optimization technology, applied in power management, electrical components, wireless communication, etc., can solve problems such as errors, hysteresis feedback information, inaccurate estimation and quantization of channel information, etc.

Inactive Publication Date: 2016-03-23
SOUTHEAST UNIV
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Problems solved by technology

However, in practice, CSIT is generally incomplete or has errors, which are mainly caused by imprecise estimation and quantization of channel information, wrong or delayed feedback information, and mutual channel delay and frequency offset.

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  • An optimization method for mimo transmission power allocation based on robust design
  • An optimization method for mimo transmission power allocation based on robust design
  • An optimization method for mimo transmission power allocation based on robust design

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Embodiment Construction

[0065] The present invention will be further described below in conjunction with the accompanying drawings.

[0066] The purpose of robust design is to maximize the minimum signal-to-noise ratio of the channel. This is a max-min problem, in which the channel information and power allocation are expressed in the form of matrix functions. In the optimization process, we take advantage of the convexity and concaveness of the matrix function to optimize layer by layer. Without loss of generality, we can prove that the optimal solution can be obtained when the power allocation matrix is ​​diagonalized in the way of the channel matrix. The method of the present invention is produced based on this conclusion. The research object of this method is the scalar function obtained by the simplification of the diagonal matrix function. For this scalar function, we give the following channel power allocation scheme, so as to obtain the optimal solution of power allocation. Since obtainin...

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Abstract

The present invention proposes a MIMO transmission power allocation optimization method based on robust design. First, the convexity and concavity of the matrix function are used to optimize the power allocation matrix into a diagonal matrix, which is simplified into a scalar function. Then, the MIMO transmission power is calculated based on the scalar function. Allocation optimization. In the MIMO transmission power allocation optimization process, the optimal solution without restrictions is first found, and then fine-tuned to ensure the algorithm's convergence and low computational complexity. The MIMO transmission power allocation optimization method based on robust design provided by the present invention can obtain the optimal solution at a relatively small computational cost compared to the universal optimal solution acquisition algorithm, and in the first step, the optimal solution is obtained. The baseline value of power allocation is fixed, and there is no problem of algorithm divergence.

Description

technical field [0001] The invention relates to a specific power allocation method for robust MIMO transmission when channel information is incomplete, and belongs to the problem of finding a power allocation strategy from imperfect channel information in a multi-antenna interference channel. Background technique [0002] As we all know, the performance of a MIMO (Multiple-Input Multiple-Output, multiple-input multiple-output) system largely depends on channel state information (Channel State Information, CSI for short). In order to realize the full benefits of the MIMO channel, channel state information (Channel State Information at the transmitter, CSIT for short) at the transmitting end can be obtained and an appropriate precoding technique can be used. If the complete CSIT can be obtained, there is already a mature MIMO optimized precoding technology in this case. However, in practice, CSIT is generally incomplete or has errors, which are mainly caused by inaccurate est...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/08H04W52/36H04W52/42H04W72/54
Inventor 王家恒赵立成梁霄赵春明
Owner SOUTHEAST UNIV
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