[1]宋铁成,尤肖虎,沈连丰.基于信号空间扩展方法降低OFDM系统的PAPR[J].东南大学学报(自然科学版),2005,35(3):323-327.[doi:10.3969/j.issn.1001-0505.2005.03.001]
 Song Tiecheng,You Xiaohu,Shen Lianfeng.Reducing peak to average power ratio of OFDM system based on signal space expansion[J].Journal of Southeast University (Natural Science Edition),2005,35(3):323-327.[doi:10.3969/j.issn.1001-0505.2005.03.001]
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基于信号空间扩展方法降低OFDM系统的PAPR()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
35
期数:
2005年第3期
页码:
323-327
栏目:
信息与通信工程
出版日期:
2005-05-20

文章信息/Info

Title:
Reducing peak to average power ratio of OFDM system based on signal space expansion
作者:
宋铁成 尤肖虎 沈连丰
东南大学移动通信国家重点实验室, 南京 210096
Author(s):
Song Tiecheng You Xiaohu Shen Lianfeng
National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
关键词:
正交频分复用 峰均功率比 信号空间扩展 子载波数
Keywords:
orthogonal frequency division multiplexing(OFDM) peak to average power ratio(PAPR) signal space expansion sub-carrier number
分类号:
TN914.3
DOI:
10.3969/j.issn.1001-0505.2005.03.001
摘要:
在分析降低正交频分复用(OFDM)系统峰均功率比(PAPR)研究进展的基础上,通过减少OFDM调制方案中使用的载波数和选择不同的载波频率进行组合使信号空间得以扩展,然后,利用穷举法选择较低PAPR的组合与发送信号建立映射关系,从而降低整个OFDM系统的PAPR,仿真研究表明该方法能有效降低OFDM系统的PAPR.针对载波数较大系统运算量较大的问题,提出了由子载波数较小系统采用模块化结构搭建子载波数较大系统的方法,与穷举法相比,该方法对子载波数较大系统不是最优的,但特别适用于信息速率自适应的OFDM系统.
Abstract:
Related research progress on reducing the peak to average power ratio(PAPR)of the orthogonal frequency division multiplexing(OFDM)system is firstly introduced. The signal space is expanded by combined decreasing practical sub-carrier number and choosing different sub-carrier frequencies. Then the selected optimal PAPR combinations by the exhausted approach are mapped to the sending signals so that the total OFDM system has the lowest PAPR. The computer simulation results indicate that the method can efficiently overcome the high PAPR problem in OFDM system. To solve the problem of large calculation quantity for large sub-carrier number system, the blocking construction from small sub-carrier number to large sub-carrier number is proposed. Although it is not optimal for the large sub-carrier number system, the proposed method is particularly adapted to the adaptive information rate OFDM system.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(60472053)、江苏省高技术研究计划资助项目(BG2003004)、教育部科学技术研究重点资助项目(02171).
作者简介: 宋铁成(1967—),男,教授,songtc@seu.edu.cn; 尤肖虎(1962—),男,博士,教授,博士生导师,xhyu@seu.edu.cn.
更新日期/Last Update: 2005-05-20