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Optimization Method of Transmission Parameters in Multi-BS Cooperative System Based on SVD Decomposition

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: 2018-01-23
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Description
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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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  • Optimization Method of Transmission Parameters in Multi-BS Cooperative System Based on SVD Decomposition
  • Optimization Method of Transmission Parameters in Multi-BS Cooperative System Based on SVD Decomposition
  • Optimization Method of Transmission Parameters in Multi-BS Cooperative System Based on SVD Decomposition

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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 present invention provides a method for optimizing transmission parameters of a multi-base station cooperative system based on SVD decomposition. matrix V; determine the precoding matrix of each cooperative base station according to the minimum chord distance criterion and matrix V hierarchical optimization; obtain the equivalent channel matrix according to the precoding matrix of each cooperative base station, and calculate the signal-to-noise ratio of the multiplexed stream; judge each complex Whether the signal-to-noise ratio of the used stream meets the system requirements, if so, determine the coding and modulation format of the multiplexed stream according to the signal-to-noise ratio of each multiplexed stream. The coding and modulation format and the precoding matrix of each cooperative base station are fed back to the user; otherwise, the number of cooperative transmission multiplexing streams is reduced by one and the above steps are repeated. The invention greatly reduces the calculation amount of transmission parameter selection, and at the same time obtains higher system throughput.

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 Patents(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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