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Multi-user MIMO pre-encoding method and system

A multi-user, precoding technology, applied in the field of wireless communication, can solve problems such as complex channel feedback information

Inactive Publication Date: 2009-03-18
新奇点智能科技集团有限公司
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Problems solved by technology

[0005] Regardless of whether the multi-user MIMO system applied in the TDD system or the FDD system adopts MMSE precoding, it is necessary to determine the precoding matrix, and the determination of the precoding matrix is ​​related to the channel feedback information. In the multi-user MIMO system, the channel feedback information is more important. Because of the complexity, how to select the corresponding channel feedback information to determine the precoding matrix has not been proposed in the prior art. Therefore, a technical problem that needs to be urgently solved by those skilled in the art is: how to correctly select the adaptive matrix according to the channel feedback information in MMSE precoding. parameters to calculate the precoding matrix

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[0046] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] refer to figure 1 , which shows a flow chart of steps of an embodiment of a method for multi-user MIMO precoding according to the present invention, which may specifically include the following steps:

[0048] Step 101, obtaining the CQI parameters of the system user combination;

[0049] Step 102, selecting the largest CQI parameter among the acquired CQI parameters;

[0050] Step 103, determine the signal-to-noise ratio according to the maximum CQI parameter;

[0051] Step 104, obtaining a system channel matrix, and generating an identity matrix according to the obtained channel matrix;

[0052] Step 105, generating a precoding matrix according to the identity matrix, channel matrix, and signal-to-noise ratio;

[0053...

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Abstract

The invention provides a multi-user multi-input and output MIMO pre-coding method, which comprises the following steps: obtaining CQI parameters of system user combinations, selecting a biggest CQI parameter in the obtained CQI parameters, determining the signal-to-noise ratio according to the biggest CQI parameter, obtaining a system channel matrix, generating a unit matrix according to the obtained channel matrix, generating a pre-coding matrix according to the unit matrix, the channel matrix and the signal-to-noise ratio, and using the pre-coding matrix to pre-process the user combinations. The invention also provides a multi-user multi-input and output MIMO pre-coding system which is corresponding to the method. The multi-user multi-input and output MIMO pre-coding method and system thereof, which are provided by the invention solve the problem that a corresponding pre-coding matrix can not be accurately determined to pre-code due to extremely high complexity of terminal feedback information in a multi-user MIMO system.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to a method and system for multi-user MIMO precoding. Background technique [0002] With the evolution of communication technology, the next-generation communication system standard 3GPP LTE-Advanced (3rd Generation Partnership Project Long Term Evolution, 3rd Generation Partnership Project Long Term Evolution high version) will further provide channel capacity several times higher than the current 3GPP system. In order to achieve such a goal, a MIMO (multiple-input multiple-output, multiple-input multiple-output) system is used in the prior art to increase channel capacity. When improving the channel capacity, the precoding technology is an important technology, which processes the signal through the obtained channel information state. At present, the precoding technology based on spatial multiplexing is commonly used in the communication field, that is, multiple transm...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04L1/06
Inventor 张辉王西强
Owner 新奇点智能科技集团有限公司
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