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Multi-user random beam forming method and system

A multi-user and beam technology, applied in diversity/multi-antenna systems, space transmit diversity, prevention/detection of errors through diversity reception, etc., can solve the problem of affecting the communication quality of users at the edge of the cell, and cannot effectively solve the mutual interference of multiplexing users, etc. problem, to achieve the effect of large system capacity

Inactive Publication Date: 2010-10-13
ZTE CORP
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Problems solved by technology

[0007] In order to solve the problem that the current LTE system affects the communication quality of users at the edge of the cell and cannot effectively solve the problem of mutual interference between multiplexing users, it is necessary to provide a multi-user random beamforming method to solve this problem

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  • Multi-user random beam forming method and system

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Embodiment Construction

[0031] The multi-user random beamforming method and system of the present invention will be described below with reference to the accompanying drawings.

[0032] see figure 1 , which is a schematic flow chart of the multi-user random beamforming method of the present invention.

[0033] The multi-user random beamforming method of the present invention comprises the following steps:

[0034] Step 101, setting a precoding codebook;

[0035] Define a set of n vectors {w 0 ,w 1 ,...,w n-1}, forming a precoding codebook. Wherein, each precoding vector corresponds to a unique label as a codeword. For example, the 4-antenna codebook given in 3GPP TS 36.211 {w 0 ,w 1 ,...w j ...,w 15}.

[0036] Step 102, selecting the main client;

[0037] In the initial stage of scheduling, the base station randomly selects a precoding codeword from the precoding codebook, such as w 1 , as the first codeword for this scheduled transmission. The base station converts the first codeword w ...

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Abstract

The invention discloses multi-user random beam forming method and system. The method comprises the following steps selecting master user ends and auxiliary user ends with the smallest interference on the master user end from user ends by a base station; defining precoding code words as first code words by the base station, and multiplying by preset first test signals to obtain first products, wherein the precoding code words are sent to the user ends when the master user ends are selected; then defining precoding code words as second code words, and multiplying by preset second test signals to obtain second products, wherein the precoding code words are sent to the user ends when the auxiliary user ends are selected; and adding the first products with the second products to form multiple beams. By adopting the method and the system, the mutual interference among multiplex users can be controlled, and moreover, bigger system capacity can be obtained only with very small feedback quantity.

Description

technical field [0001] The present invention relates to a wireless mobile communication system, in particular to a multi-user random beam forming method and system in the wireless mobile communication system. Background technique [0002] In the 3Gpp Long-Term Evolution (LTE) system, important features of Multiple-Input Multiple-Output (MIMO) technology are introduced, and the LTE system supports multiple MIMO technologies. The basic MIMO model is the downlink 2x2, uplink 1x2 antennas. Specific MIMO technologies include downlink space-frequency coding, precoding, and beamforming. Uplink adopts virtual MIMO technology, which can dynamically pair user terminals and share the same time-frequency domain resources for multi-user virtual MIMO transmission, thereby improving the capacity of the uplink system. [0003] In a multi-user environment, a relatively simple solution that can achieve a larger system capacity is multi-user diversity, that is, a multi-user system uses the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L1/06
Inventor 王衍文李岩刘文豪
Owner ZTE CORP
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