Multi-base-station cooperative system parameter transmission optimization method based on singular value decomposition (SVD)

A cooperative system and transmission parameter technology, which is applied in the field of mobile communication, can solve the problems of large amount of calculation, difficult implementation, and lack of consideration of channel state information of cooperative base stations, so as to achieve high system throughput and reduce the effect of calculation

Inactive Publication Date: 2013-05-08
SHANGHAI RES CENT FOR WIRELESS COMM
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Problems solved by technology

[0004] The selection mechanism of the transmission parameters of a single base station does not consider the channel state information of the cooperative base station, so it cannot achieve better throughput performance in the multi-base station cooperative system; if the multi-base station cooperative system is regarded as a virtual single-base station system, it needs Performing global codebook traversal, although good system performance can be obtained, but the amount of calculation is large and difficult to implement

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  • Multi-base-station cooperative system parameter transmission optimization method based on singular value decomposition (SVD)
  • Multi-base-station cooperative system parameter transmission optimization method based on singular value decomposition (SVD)
  • Multi-base-station cooperative system parameter transmission optimization method based on singular value decomposition (SVD)

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Embodiment 1

[0024] This embodiment provides a method for optimizing the transmission parameters of a multi-base station cooperative system based on SVD decomposition. The method is applicable to a cooperative transmission mode in which multiple cooperative base stations serve a cell edge user. At this time, the coordinated base stations send the same user data, and the coordinated base station Using the same number of multiplexed streams and coding and modulation methods, the precoding matrix of each cooperative base station is selected separately.

[0025] In this embodiment, the application environment of the SVD-based multi-base station cooperative system transmission parameter optimization method is as follows: assuming that the number of base stations participating in the cooperation is N, the channel matrix between a single base station (also called a cooperative base station) and a user is respectively denoted as H 1 , H 2 ,...,H N . For multi-base station joint channel matrix H...

Embodiment 2

[0041] This embodiment provides a method for optimizing transmission parameters of a multi-base station cooperative system based on SVD decomposition. The application scenarios of this method are as follows: figure 2 Shown: 3 coordinated base stations serve one cell edge user, and the number of coordinated base stations is N=3; where, BS represents a base station, UE represents a cell edge user, and Backhaul represents a backbone network or an X2 interface between base stations. Each base station uses the codebook defined by LTE. The number of transmitting antennas at the base station is 4, and the number of receiving antennas at the user end is 4. At this time, the maximum number of multiplexed streams is 4, and each stream number corresponds to the number of precoding matrices in the codebook. The number is 16. The channel matrices from 3 base stations to users are H 1 , H 2 and H 3 .

[0042] The implementation process of the transmission parameter optimization method o...

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Abstract

The invention provides a multi-base-station cooperative system parameter transmission optimization method based on singular value decomposition (SVD). The method comprises that a cooperative transmission multiplex flux of each cooperative base station is initialized to be a rank of a united channel matrix of each cooperative base station; the united channel matrix of each cooperative base station is discomposed according to SVD and a matrix V is obtained; a precoding matrix of each cooperative base station is determined according to the chordal distance minimum principle and classification optimization of the matrix V; an equivalent channel matrix is obtained according to the precoding matrix of each cooperative base station, and a signal to noise ratio of each multiplex flux is calculated; whether the signal to noise ratio of each multiplex flux satisfies the requirements of a system is judged, if the signal to noise ratio of each multiplex flux satisfies the requirements, a coding modulation format of each multiplex flux is determined according to the signal to noise ratio of each multiplex flux and the multiple flux transmitted by each cooperative base station, the coding modulation format of each multiplex flux and the precoding matrix of each cooperative base station are fed back to a user; and otherwise, the steps above are repeated after each cooperative transmission multiplex flux minus one. According to the multi-base-station cooperative system parameter transmission optimization method based on SVD, transmission parameter selective calculated amount is reduced greatly and high throughput of a system is obtained.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a transmission parameter optimization method, in particular to a multi-base station cooperative system transmission parameter optimization method based on SVD decomposition. Background technique [0002] Coordinated Multi-Point transmission (Coordinated Multi-Point, CoMP) technology can effectively suppress co-channel interference through inter-cell application, improve system spectrum efficiency, especially improve spectrum efficiency of cell edge users. According to different transmission modes, CoMP technology can be divided into two categories: joint processing technology and cooperative beamforming technology. For the cooperative beamforming technology, only the serving cell where the terminal is located sends data to the terminal, and the cooperative cells participating in the coordination can use the same radio resource block to serve other different terminals. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L1/00
Inventor 易正琨熊勇杨秀梅贾国庆张镝
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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