Method for decreasing same channel interference between users of upper FDMA cellular system

A co-channel interference and cellular system technology, applied in the field of reducing co-channel interference between users, can solve problems such as high implementation complexity, low total data transmission rate, and many signaling interactions between users and base stations

Inactive Publication Date: 2007-09-05
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems in the prior art that the spectrum reuse coefficient is low, or the total data transmission rate of the system is low, or the implementatio

Method used

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  • Method for decreasing same channel interference between users of upper FDMA cellular system
  • Method for decreasing same channel interference between users of upper FDMA cellular system
  • Method for decreasing same channel interference between users of upper FDMA cellular system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0093] A specific uplink FDMA cellular system parameter configuration is given below to illustrate the implementation steps of the present invention. It should be noted that the parameters in the following example do not affect the generality of the present invention.

[0094] Uplink FDMA

Cellular system parameters

Set up

Cellular system model and layout

A regular hexagonal honeycomb grid, the simulation uses 7 small

Zone model, there are 3 sectors in each cell

User distribution

Random uniform distribution

The distance between cell base stations D

500m

The signal power varies with the distance between the user and the base station

Decay function

L=128.1+37.6log 10 (R), the unit is dB,

R is the distance between the user and the base station, in Km

Shadow fading standard deviation

8dB

Shadow fading correlation distance

50m

Shadow fading

Correlation coefficient

Between cel...

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Abstract

The method comprises: the base station allocates the dedicated resources for the edge users, and ensures an overlapping between the user-dedicated resources in adjacent cells or sectors; user monitors and detects the downlink signals of current cell and sector or adjacent cell and sector, which contains flag information, to get downlink signal detection information; estimating the anti-interference status of user and the interference to the users in adjacent cell or sector; according to the result, allocating the right of using the resources, and then scheduling and allocating the resources; finally, adapting the uplink of user.

Description

Technical field [0001] The invention relates to a method for reducing co-channel interference in the field of communication technology, in particular to a method for reducing co-channel interference between users applied to an uplink FDMA cellular system. Background technique [0002] FDMA (Frequency Division Multiple Access) is the main multiple access method adopted by the cellular system. Its characteristic is that different users use different spectrum resources when accessing the system. At present, OFDM (Orthogonal Frequency Division Multiplexing) technology and SC-OFDM (Single Carrier Orthogonal Frequency Division Multiplexing) technology are the main technologies for implementing FDMA. The 3GPP organization (3rd Generation Mobile Communications Partnership Project) international organization is designing EUTRA (Evolved Universal Mobile Telecommunications System and Land-based Radio Access) and EUTRAN (Evolved Universal Mobile Telecommunications System Network and Land-bas...

Claims

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Application Information

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IPC IPC(8): H04Q7/34H04Q7/36H04B1/707H04B7/005H04L27/26H04J11/00H04W16/02H04W72/04
Inventor 丁铭罗汉文张际佘锋
Owner SHANGHAI JIAO TONG UNIV
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