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Interference alignment method of up cell

A technology of cell interference and inter-cell interference, applied in baseband system components, shaping networks in transmitters/receivers, etc., can solve the problems of minimization of inter-cell interference and serious residual interference, and increase the reception signal interference. noise ratio, improved throughput performance, and the effect of improved throughput performance

Inactive Publication Date: 2013-04-03
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, because minimizing the expected value does not guarantee that the inter-cell interference is minimized every time a signal is received, and the upper bound selected by the D-IA algorithm is relatively loose, the residual interference is still serious after using the D-IA algorithm, and the residual There is room for further suppression of interference

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  • Interference alignment method of up cell
  • Interference alignment method of up cell
  • Interference alignment method of up cell

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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] see figure 1 , first introduce the application scenario of the method of the present invention: the uplink network of the two-cell multi-user system, wherein the number of transmitting antennas of the user is N T and the number of receiving antennas of the base station N R Both are M, namely N T =N R = M, cell i has K i users are located at the edge of the cell, i∈{1, 2}, the number of users satisfies K i ≤M-1, each user in cell i sends to the cell base station BS i Send single-stream data, indicated by black solid arrow in the figure, to the base station BS of the adjacent cell i′ Inter-cell interference is caused, indicated by the red dotted arrow in the figure, i′∈{1, 2}, and i′≠i; the base stations are connected through wired channels and can tran...

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Abstract

An interference alignment method of an up cell includes the following steps that a channel matrix of an up channel of the cell is acquired at a base station, precoding vector of users in the cell is calculated at the base station end according to the channel matrix, and the base station feeds back precoding vector to the users in the cell, calculation and adjustment of a receiver are adjusted at the base station end in self-adaption mode according to the channel matrix and the fed back precoding vector to minimize residual interference between cells. The method restrains interference between the cells in the interference alignment method, achieves minimization of residual cell interference in an up network of a wireless honeycomb system using limited feedback, and effectively improves system throughput capacity.

Description

technical field [0001] The invention relates to an uplink cell interference alignment method, which belongs to the technical field of wireless communication. Background technique [0002] Interference alignment technology, as a method of interference processing, is conducive to improving the degree of freedom available to the system, thereby achieving greater system throughput. At present, the research on interference alignment technology has gradually shifted from theoretical research to the application in practical communication systems, and the application of interference alignment technology in actual communication systems is often combined with limited feedback technology. Among them, as an important practical application of the interference alignment technology, the cell interference alignment technology using limited feedback can effectively suppress the interference between cells and improve the throughput performance of the wireless cellular system. [0003] Interf...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
Inventor 吕铁军方翟
Owner BEIJING UNIV OF POSTS & TELECOMM
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