OFDM (Orthogonal Frequency Division Multiplexing) system inter-cell interference elimination method based on IDMA (Interleave-Division Mutiple-Access)

An inter-cell interference and cell technology, applied in baseband system components, transmission systems, multi-frequency code systems, etc., can solve problems that do not involve inter-cell interference, etc.

Inactive Publication Date: 2011-09-21
SOUTH CHINA UNIV OF TECH
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At present, there are few patents related to IDMA technology in China, and there is no p

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  • OFDM (Orthogonal Frequency Division Multiplexing) system inter-cell interference elimination method based on IDMA (Interleave-Division Mutiple-Access)
  • OFDM (Orthogonal Frequency Division Multiplexing) system inter-cell interference elimination method based on IDMA (Interleave-Division Mutiple-Access)
  • OFDM (Orthogonal Frequency Division Multiplexing) system inter-cell interference elimination method based on IDMA (Interleave-Division Mutiple-Access)

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[0034] The implementation of the present invention will be further described below in conjunction with the drawings, but the implementation of the present invention is not limited to this.

[0035] Inter-cell interference cancellation method of OFDM system based on IDMA is to distinguish different cell base station transmitters by configuring different interleavers; mobile user receivers classify all base stations except the target cell base station T-BS according to the strength of the interference signal For the strong interference base station S-BS and the weak interference base station W-BS, the W-BS signal is treated as Gaussian noise, and the T-BS and S-BS signals are iteratively detected, thereby suppressing the interference outside the T-BS , To obtain the estimated data of T-BS.

[0036] The OFDM system model based on IDMA is attached figure 2 Shown. There are two main parts: cell base station transmitter and mobile user receiver.

[0037] The cell base station transmitte...

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Abstract

The invention provides an OFDM (Orthogonal Frequency Division Multiplexing) system inter-cell interference elimination method based on IDMA (Interleave-Division Mutiple-Access), which comprises the following steps of: distinguishing different cell base station transmitters by configurations of different interleavers; and classifying all the base stations except a T-BS (Target cell Base Station) into an S-BS (Strong interference Base Station) and a W-BS (Weak interference Base Station) according to strength of interference signals by a mobile user receiver, wherein a signal of the W-BS is processed as a gaussian noise, a signal of the T-BS and a signal of the S-BS are detected in iteration, therefore interference outside the T-BS can be suppressed and estimate data of the T-BS can be obtained. The OFDM system inter-cell interference elimination method based on IDMA, provided by the invention, has the advantage of excellent interference suppression performance gained from iteration.

Description

Technical field [0001] The invention relates to a technique for suppressing inter-cell interference in a mobile communication system, in particular to a method for eliminating inter-cell interference in an OFDM system based on IDMA. Background technique [0002] Inter-cell interference is an inherent problem of cellular mobile communication systems. Orthogonal frequency division multiplexing OFDM technology reduces the intra-cell interference to a very low level, and inter-cell interference becomes the main interference that affects system performance. At present, there have been some researches on inter-cell interference suppression technology of OFDM system at home and abroad, while domestic research on this is concentrated on interference coordination, and there is relatively little research on interference cancellation technology. The invention patent focuses on the interference elimination method based on IDMA. [0003] Interleave-Division Multiple Access IDMA (Interleave-Di...

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Application Information

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IPC IPC(8): H04B1/7105H04L27/26H04L25/02H04L1/00
Inventor 陈芳炯林瑾
Owner SOUTH CHINA UNIV OF TECH
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