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

An inter-cell interference and orthogonal frequency division technology, which is applied in multi-frequency code systems, wireless communications, electrical components, etc., can solve the problems of reducing inter-cell interference and reducing inter-cell interference in orthogonal frequency division multiplexing systems, etc. Achieve the effect of overcoming inherent shortcomings and saving transmission redundancy

Active Publication Date: 2010-11-10
SHANGHAI ULTIMATE POWER COMM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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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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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

A Method for Reducing Inter-cell Interference in Orthogonal Frequency Division Multiplexing System technical field 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 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 subcarriers 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04W72/54
Inventor 索士强王映民
Owner SHANGHAI ULTIMATE POWER COMM TECH
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