| OFDM系统中降低峰均比技术的研究 |
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| 引用本文： | 马恒,宋志群.OFDM系统中降低峰均比技术的研究[J].无线电工程,2008,38(4):58-61. |
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| 作者姓名： | 马恒 宋志群 |
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| 作者单位： | 中国电子科技集团公司第五十四研究所,河北,石家庄,050081 |
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| 摘 要： | 正交频分复用(OFDM)是4G的核心技术之一,但是OFDM系统的高峰均比(PAPR)问题一直是将该技术实用化的一大障碍。介绍了峰均比的定义和目前国内外存在的几种主要的降低PAPR的技术。针对传统PTS算法中计算量过大这一缺点,研究了迭代搜索加权系数的算法,并提出了一种利用Hadamard矩阵作为加权系数的PTS算法。该算法与迭代算法相比,在降低PAPR性能损失很小的情况下,可显著缩短运算时间。
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| 关 键 词： | OFDM 峰均比 部分传输序列 Hadamard矩阵 |
| 文章编号： | 1003-3106(2008)04-0058-04 |
| 修稿时间： | 2007年11月12 |
Research on Technology of Peak-to-average Power Ratio Reduction in OFDM System |
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| MA Heng,SONG Zhi-qun.Research on Technology of Peak-to-average Power Ratio Reduction in OFDM System[J].Radio Engineering of China,2008,38(4):58-61. |
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| Authors: | MA Heng SONG Zhi-qun |
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| Abstract: | OFDM(Orthogonal Frequency Division Multiplexing)is one of the core technologies of 4G in the future,but the problem of high Peak-to-Average Power Ratio(PAPR)of OFDM systems remains as one of the main obstacles that limit the application of OFDM.This paper introduces the definition of PAPR and some main methods of PAPR reduction.In order to reduce the large computation complexity of conventional PTS,an improved method-iterative shifting linear searching has been analyzed,and a PTS method using Hadamard matrix has been proposed.The performance of this method is a little worse than the iterative method,but it can reduce the time of computation obviously. |
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| Keywords: | OFDM peak-to-average power ratio partial transmit sequences Hadamard matrix |
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