| 降低MIMO-OFDM系统PAPR的一种改进方法 |
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| 引用本文： | 李光远,杨守义,穆晓敏,齐林. 降低MIMO-OFDM系统PAPR的一种改进方法[J]. 微计算机信息, 2007, 23(24): 86-88 |
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| 作者姓名： | 李光远 杨守义 穆晓敏 齐林 |
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| 作者单位： | 郑州大学信息工程学院,郑州,450052 |
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| 基金项目： | 国家自然科学基金(NO.60472044) |
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| 摘 要： | MIMO-OFDM已成为4G宽带无线通信中极具前景的备选方案,但MIMO-OFDM系统中存在一个主要缺点——高峰均比,本文基于天线旋转取反方法,提出了多天线系统PAPR降低的改进方法,充分利用增加天线提供的自由度,改善了系统性能。性能分析表明,所用方法可以获得明显的峰均比改善,并提出了两种次最优方法,降低了计算复杂度,实现更为简便。
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| 关 键 词： | MIMO OFDM 峰均比 CARI |
| 文章编号： | 1008-0570（2007）08-3-0086-03 |
| 修稿时间： | 2007-07-03 |
An Improved Method for Peak-to-Average Power Ratio Reduction in MIMO-OFDM System |
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| LI GUANGYUAN,YANG SHOUYI,MU XIAOMIN,QI LIN. An Improved Method for Peak-to-Average Power Ratio Reduction in MIMO-OFDM System[J]. Control & Automation, 2007, 23(24): 86-88 |
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| Authors: | LI GUANGYUAN YANG SHOUYI MU XIAOMIN QI LIN |
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| Affiliation: | College of Information Engineering, Zhengzhou University, Zhengzhou 450052,China |
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| Abstract: | MIMO-OFDM has become a promising candidate for 4G mobile wireless systems. But one of the major drawbacks is the high peak-to-average power ratio (PAPR). In this paper,The PAPR is reduced further by increasing the degrees of freedom for two antennas,based on a scheme of cross-antenna rotation and inversion (CARI). We have also proposed an improved scheme for more antenna system,which obtains better performance by utilizing additional degrees of freedom. The performance analyses have shown that remarkable improvement of PAPR is obtained by the proposed scheme. Two suboptimal schemes are also investigated,which are easy in computation and simple in implementation. |
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| Keywords: | MIMO OFDM PAPR CARI |
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