一种降低OFDM系统峰均功率比的算法

北京邮电大学学报 ›› 2004, Vol. 27 ›› Issue (5): 60-64.

一种降低OFDM系统峰均功率比的算法

靳晓嘉, 陈波, 刘鑫, 宋俊德

北京邮电大学电子工程学院, 北京 100876

收稿日期:2003-07-24 出版日期:2004-05-28
作者简介: 靳晓嘉(1972—), 男, 博士生. E-mail:jinxiaojia@he.chinamobile.com;宋俊德(1938—), 男, 教授, 博士生导师. E-mail:jdsong@bupt.edu.cn
基金资助:
国家“863计划”项目(2001AA123016)

A New Algorithm for Reducing the PAPR of OFDM Signals

JIN Xiao-jia, CHEN Bo, LIU Xin, SONG Jun-de

Elect roni c Engin eering Sch ool , Bei jing Universit y of Pos t s and Tel ecom municat ions , Bei jing 100876, China

Received:2003-07-24 Online:2004-05-28

摘要/Abstract

摘要： 在对选择映射和分步传输序列算法进行研究的基础上,提出了一种新的降低峰均功率比的算法——分段映射算法,并对其进行了理论推导。分段映射算法首先将原始信号序列分为V个部分,每个部分称为一个子路;通过控制这些子路随机变量的功率方差,从而达到控制信号序列峰均功率比的目的。分段映射算法需要额外付出的代价是对计算得出的映射表进行存储。实际的仿真结果证明:分段映射算法结构简单,相对于选择映射和部分传输序列等扰码算法在降低系统峰均功率比方面具有较好的效果。

关键词: 峰均功率比, 选择映射, 部分传输序列, 分段映射

Abstract: On the basis of studying the SLM(selected mapping) and PTS(partial transmit sequences) algorithms,a new algorithm named as subsection mapping is proposed and deduced to reduce the PAPR(peak to average power ratio) of OFDM(orthogonal frequency division multiplexing) signals. The main idea of subsection mapping is to divide the signal sequence intoseveral parts which are called subsequences. By controlling the power varianceof the subsequences the PAPR of the signal sequence can be restricted. The disadvantage of the subsection mapping is that the mapping table has to be stored inthe memory. After the theoretic deduction and numerical simulation, this new algorithm is proved to have better performance for reducing the PAPR of OFDM signals comparing to the SLM and PTS.

Key words: peak to average power ratio, selected mapping, partial transmit sequences, subsection mapping

中图分类号:

TN914.51

靳晓嘉, 陈波, 刘鑫, 宋俊德. 一种降低OFDM系统峰均功率比的算法[J]. 北京邮电大学学报, 2004, 27(5): 60-64.

JIN Xiao-jia, CHEN Bo, LIU Xin, SONG Jun-de. A New Algorithm for Reducing the PAPR of OFDM Signals[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2004, 27(5): 60-64.

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