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MIMO mode self-adapting switch method and device

An adaptive switching, multi-input and multi-output technology, applied in diversity/multi-antenna systems, radio transmission systems, electrical components, etc., can solve the problems of large amount of calculation and high complexity, achieve rapid and accurate response, simple method, and reduce The effect of calculation volume

Active Publication Date: 2009-05-13
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
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Problems solved by technology

[0012] In view of this, embodiments of the present invention provide a method and device for adaptively switching multiple-input multiple-output modes to solve the problems of large amount of calculation and high complexity in the prior art

Method used

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  • MIMO mode self-adapting switch method and device

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Embodiment Construction

[0027] In the embodiment of the present invention, the switching decision is made by comparing the preset capacity switching threshold of the MIMO mode to be switched with the calculated channel capacity in the current MIMO mode.

[0028] The principle of adaptive switching of the MIMO mode in the embodiment of the present invention is as follows: figure 1 As shown, the condition number is calculated according to the channel transition matrix obtained in the channel estimation. The size of the condition number represents the level of channel correlation. When the condition number is equal to 1, it indicates that the channel is not correlated, and the channel of the current MIMO mode is predicted according to the measured channel quality. capacity. The MIMO adaptive threshold table provides the condition number under each channel level and the capacity switching threshold of the MIMO mode to be switched under each channel level. According to the calculated condition number of ...

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Abstract

The invention discloses an MIMO mode self-adapting switching method for solving problems of large calculation amount and high complexity in the prior art. The method comprises: determining channel grade according to condition number of a channel; calculating channel capacity of an MIMO mode needing to be switched; and determining the switched MIMO mode according to the channel grade and one calculated MIMO mode needing to be switched. The invention also discloses an MIMO mode self-adapting switching device. The method reduces calculation amount, can quickly and accurately reflect channel quality information, indicates self-adapting switch among the MIMO modes, and effectively matches the channel.

Description

technical field [0001] The present invention relates to the field of mobile communication systems, and in particular, to a method and device for adaptive switching of multiple input multiple output (Multiple Input-Multiple Output, MIMO) modes. Background technique [0002] In mobile communication systems, in order to obtain high availability and high reliability, MIMO technology is introduced. Due to many factors in the communication process, it is difficult to keep the channel stable, and each MIMO mode can only play its best effect under certain channel conditions. In order to match the channel, it is necessary to use different MIMO mode to ensure communication quality. [0003] At present, in the mobile communication system, the channel quality information can be fed back to the transmitter through the receiver, and the transmitter selects the most suitable MIMO mode according to the channel quality information according to certain criteria, and transmits data, so as to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/06H04W36/30H04B1/707H04B7/02
CPCH04B7/0413
Inventor 侯云哲肖国军索士强孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD
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