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A multi-user mimo cooperative transmission method based on weight and rate maximization

A cooperative transmission, multi-user technology, applied in transmission systems, radio transmission systems, electrical components, etc., can solve problems such as poor weighting and rate performance, and achieve the effect of ensuring bit error performance, improving overall performance, and eliminating multi-user interference.

Active Publication Date: 2017-07-18
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The BD-GMD-THP cooperative transmission method improves the bit error performance of the system through the nonlinear precoding method, but each user receives a fixed Signal to Interference plus Noise Ratio (SINR), and the weighted sum of the entire system Poor rate performance

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  • A multi-user mimo cooperative transmission method based on weight and rate maximization
  • A multi-user mimo cooperative transmission method based on weight and rate maximization
  • A multi-user mimo cooperative transmission method based on weight and rate maximization

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Embodiment Construction

[0022] The present invention provides a multi-user MIMO cooperative transmission method based on weighted and rate maximization. In the LTE-AMU-MIMO coordinated multi-point transmission system, the cooperative node simultaneously schedules K users through a multi-user scheduling algorithm, and through the X2 interface Share information such as the CSI of this node to all users, the data information of each scheduling user, and the rate weight factor. In this method, BD-GMD decomposition is first performed on the joint channel matrix H of all scheduled users, and BD-GMD-THP precoding is performed based on the weighted and rate maximization criterion, thereby eliminating system multi-user interference and inter-user data stream interference , to a certain extent, the bit error performance of the system is guaranteed, and, while ensuring that the receiving signal-to-noise ratio of each data stream of the user is equal, the weighting and rate of the entire system can be optimized. ...

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Abstract

The invention discloses a multi-user MIMO cooperative transmission method based on weighting and rate maximization and belongs to the technical field of mobile communication. The method includes the following steps that cooperative nodes exchange channel state information, data information and rate weight factors of all scheduling users through an X2 interface; the cooperative nodes perform BD-GMD-THP pre-coding on the basis of the weighting and the rate maximization criterion according to the information; after a user terminal receives a signal, corresponding decoding is performed according to an cooperative transmission scheme, and thus a transmission signal is detected. In an MU-MIMO cooperative multi-point transmission system, multi-user interference and interference between data streams of the users are effectively eliminated through a nonlinear pre-coding method, and a low bit error rate of the system is guaranteed to a certain extent; meanwhile, due to the BD-GMD-THP cooperative transmission scheme based on the weighting and the rate maximization criterion, while it is guaranteed that all the data streams of the users have the same receiving signal-to-noise ratio, the weighting and rate performance of the system can be made optimal, and the overall performance of a CoMP united transmission system is improved.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a multi-user MIMO cooperative transmission method based on weighting and rate maximization. Background technique [0002] In order to meet the needs of future mobile communication service growth, the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) officially launched the follow-up evolution of Long Time Evolution (LTE) in March 2008 (Long Time Evolution-Advanced, LTE -A) project, and completed the LTE-A technical requirements report in June 2008, the report shows that the performance requirements of the LTE-A system will be significantly improved compared with LTE. [0003] Orthogonal Frequency Division Multiplexing (OFDM) technology divides a frequency-selective wideband channel into several orthogonal narrowband sub-channels, and each sub-channel maintains a flat fading characteristic in the frequency domain. The user data information o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04B7/0452H04B7/0456H04B7/0426
Inventor 景小荣赵月芳胡海飞张祖凡陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM
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