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Method for eliminating uplink span time slot interference of time division duplex cellular system

A technology of cellular system and time slot interference, which is applied in the transmission system, electrical components, wireless communication, etc., can solve the problems affecting the signal reception of the mobile station in the cell, reduce the difficulty of design and processing, eliminate the uplink cross-slot interference, Effects with fast processing speed

Inactive Publication Date: 2010-08-04
SOUTHWEST JIAOTONG UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

Since there is usually a good transmission path between base stations, and the transmission power of the base station is much greater than that of the mobile station, the uplink cross-slot interference will seriously affect the reception of the mobile station signal by the base station.

Method used

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  • Method for eliminating uplink span time slot interference of time division duplex cellular system
  • Method for eliminating uplink span time slot interference of time division duplex cellular system
  • Method for eliminating uplink span time slot interference of time division duplex cellular system

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specific Embodiment approach

[0032] A kind of embodiment of the present invention, a kind of method for eliminating time division duplex cellular system uplink cross-slot interference, its steps are:

[0033] A. Group division and allocation of autocorrelation sequences: the cellular system is divided into many non-overlapping group groups, and each group group consists of N≥2 adjacent cells {C i |i=1, 2,..., N} form; determine N mutually different sequences {r i |i=1, 2,..., N}; the N sequences r i , corresponding to the N cells C assigned to each cluster i , the same sequence r is assigned to any two clusters i cell C i The distances between them are equal; the base stations of all cells are equipped with one transmitting antenna and N receiving antennas.

[0034] N different sequences {r i |i=1, 2,..., N} means that the matrix T=[r 1 r 2 ...r N ] is a full-rank matrix.

[0035] In this example:

[0036] The number of cells in each group is N=7, and the length of each autocorrelation sequence ...

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Abstract

The invention discloses a method for eliminating uplink span time slot interference of a time division duplex cellular system, which comprises the following steps: A. dividing the cellular system into a plurality of non-overlapped region groups, wherein each region group is formed by N adjacent cells; correspondingly distributing N different sequences to N cells in various region groups; B. determining a span time slot area at which an uplink time slot is positioned according to the service condition and counting the number of adjacent cells positioned at downlink in the uplink span time slot area by a base station of each cell; C. preprocessing a transmitting signal and ensuring that autocorrelation sequences of transmitting signals of all users in the same cell are equal to the distributed sequences; and D. self-adaptively processing a receiving signal by adopting an autocorrelation-based detection method, eliminating the uplink span time slot interference and restoring a signal of a transmitting end by adopting an inversion processing method. The method has high utilization rate of frequency spectrum source and good elimination effect of the uplink span time slot interference and can effectively eliminate strong uplink span time slot interference.

Description

technical field [0001] The invention relates to a method for eliminating interference of neighboring cells in a wireless cellular communication system in a time-division duplex mode, in particular to a method for eliminating cross-slot interference in an uplink. Background technique [0002] In mobile communication systems, duplex technology is an important technical solution for wireless resource allocation. The duplex mode of the mobile communication system mainly includes frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). Frequency division duplex technology is to deploy the uplink and downlink to two non-overlapping frequencies, and it is necessary to use paired frequencies to achieve duplex communication; time division duplex technology is to allocate the uplink and downlink to the same frequency. On the frequency, the uplink and downlink occupy different time periods respectively. Time-division duplex tech...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04B1/707
Inventor 虞凯范平志郝莉
Owner SOUTHWEST JIAOTONG UNIV
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