Method for reducing interference between sectors in orthogonal frequency division multiplex system

A technology of inter-cell interference and orthogonal frequency division, applied in the direction of multi-frequency code system, electrical components, radio/inductive link selection arrangement, etc., can solve the problem of reducing inter-cell interference in OFDM system, which cannot be reduced Inter-cell interference and other issues, to overcome inherent shortcomings and save transmission redundancy

Active Publication Date: 2007-05-09
SHANGHAI ULTIMATE POWER COMM TECH
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Problems solved by technology

[0007] The problem to be solved by the present invention is to propose a method for reducing inter-cell interference in an OFDM system, so as to solve the defect that the prior art cannot reduce inter-cell interference without reducing the system spectrum efficiency

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  • Method for reducing interference between sectors in orthogonal frequency division multiplex system
  • Method for reducing interference between sectors in orthogonal frequency division multiplex system
  • Method for reducing interference between sectors in orthogonal frequency division multiplex system

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Embodiment Construction

[0043] Below we will describe in detail the best implementation of the present invention with reference to the accompanying drawings. First of all, it should be pointed out that the meanings of the terms, words and claims used in the present invention should not be limited to their literal and ordinary meanings, but also include meanings and concepts consistent with the technology of the present invention, because It is up to us, as inventors, to define terms appropriately in order to best describe our inventions. Therefore, the configurations given in this specification and the accompanying drawings are only preferred implementations of the present invention, rather than enumerating all technical characteristics of the present invention. We need to recognize that there are various equivalents or modifications that could replace ours.

[0044] As shown in FIG. 2 and FIG. 3 , schematic diagrams of subcarrier allocation in the case of an omni-directional cell and a three-sector...

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Abstract

The method comprises: in the first, judging the location of user; if it is in center of cell, the used subcarrier is in the range of start-stop and there are available frequency resources at outside of the range, then adjusting the subcarrier of the user to the outside of the range of start-stop; if the user is at the edge of cell, the used subcarrier is at the outside of the range of start-stop, and there are available frequency resources in the range of start-stop of subcarrier, the subcarrier of user is adjusted to the inside of the range of start-stop, by which making user data transmission; if there are not resources in the range of start-stop of subcarrier, the user can use a subcarrier identical or partly identical with another user to transmit user data.

Description

technical field [0001] The invention relates to a method for inter-cell interference in the field of mobile communication, in particular to a method for reducing inter-cell interference in an orthogonal frequency division multiplexing system. Background technique [0002] A cellular mobile communication system modulated by OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) refers to a cellular mobile communication system in which users use multiple orthogonal sub-carriers for data transmission. In this system, since the subcarriers used by different users are orthogonal to each other, there is no inter-user interference in the cell. However, users in different cells will use the same sub-carrier for data transmission, which will cause greater inter-cell interference. Therefore, for cellular mobile communication systems based on OFDM modulation, inter-cell interference becomes the main interference. [0003] As a method of reducing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/36H04L27/26H04W72/08H04W72/12
Inventor 索士强王映民
Owner SHANGHAI ULTIMATE POWER COMM TECH
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