Method to reduce PAPR in OFDM system

doi:10.3778/j.issn.1002-8331.2008.21.024

Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (21): 89-91.DOI: 10.3778/j.issn.1002-8331.2008.21.024

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Method to reduce PAPR in OFDM system

CHEN Ning,LU Chang-bing

School of Information Science and Engineering，Central South University，Changsha 410083，China

Received:2007-10-09 Revised:2008-01-21 Online:2008-07-21 Published:2008-07-21
Contact: CHEN Ning

降低OFDM系统峰均比方法的研究

陈宁,卢长兵

中南大学信息科学与工程学院，长沙 410083

通讯作者: 陈宁

Abstract

Abstract: With respect to the problem of high Peak-to-Average Power Ratio（PAPR） of Orthogonal Frequency Division Multiplexing（OFDM），an improved reducing PAPR method by reversed subcarriers is presented.Making use of IFFT/FFT at the the sending port，a sequence of reducing the peak in frequency domain is produced to reduce PAPR in OFDM system.Code error rate is not increased in the process，and the result is obvious in reducing PAPR.The effectiveness of the proposed scheme is demonstrated by simulations.

Key words: Orthogonal Frequency Division Multiplexing（OFDM）, reversed subcarriers, Peak-to-Average Power Ratio（PAPR）

摘要： 针对正交频分复用系统（OFDM）所具有的高峰均比问题，提出了一种改进的预留子载波降低OFDM系统峰均比功率的方法。在系统的发送端利用IFFT/FFT变换对，产生频域消峰序列，以降低OFDM系统峰均比。该方法在产生消峰序列过程中不会导致误码率的增加，降低PAPR效果明显。仿真数据证明了该方法的有效性。

关键词: 正交频分复用, 预留载波, 峰均比

CHEN Ning,LU Chang-bing. Method to reduce PAPR in OFDM system[J]. Computer Engineering and Applications, 2008, 44(21): 89-91.

陈宁,卢长兵. 降低OFDM系统峰均比方法的研究[J]. 计算机工程与应用, 2008, 44(21): 89-91.

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Method to reduce PAPR in OFDM system

降低OFDM系统峰均比方法的研究

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