Signal decomposition algorithm for reducing peak-to-average power ratio of OFDM

doi:10.11772/j.issn.1001-9081.2013.09.2460

Journal of Computer Applications ›› 2013, Vol. 33 ›› Issue (09): 2460-2462.DOI: 10.11772/j.issn.1001-9081.2013.09.2460

• Network and communications • Previous Articles Next Articles

Signal decomposition algorithm for reducing peak-to-average power ratio of OFDM

TONG Yinghua,GENG Shengling

College of Computer, Qinghai Normal University, Xining Qinghai 810008, China

Received:2013-03-22 Revised:2013-05-06 Online:2013-10-18 Published:2013-09-01
Contact: TONG Yinghua
Supported by:
The National Natural Science Fund; Qinghai Normal University Innovation Project

信号分解法降低OFDM符号峰均功率比的算法

童英华,耿生玲

青海师范大学计算机学院, 西宁 810008

通讯作者: 童英华
作者简介:童英华(1982-),女,青海湟中人,讲师,硕士,主要研究方向:嵌入式系统优化、信息物理融合系统、物联网、数字信号处理;
耿生玲(1970-),女,青海都兰人,教授,博士,主要研究方向:计算理论、数据挖掘、智能控制。
基金资助:
国家自然科学基金资助项目;教育部“春晖计划”合作科研项目;青海师范大学创新项目

Abstract

Abstract: In the Orthogonal Frequency Division Multiplexing (OFDM) system, comparatively high signal Peak-to-Average Power Ratio (PAPR) leads to the distortion of transmitter signal. Therefore, this paper put forward a better way to reduce PAPR. It introduced the OFDM method of signal decomposition in great detail; it decomposed base band part OFDM symbol into two signals; and it verified the improvement degree of PAPR with different comparison threshold and decomposition threshold. The simulation results prove that, signal decomposition method can reduce the PAPR value of base band by 3dB-4dB under the reasonable comparison threshold and decomposition threshold.

Key words: Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Alternative Time Decomposition (ALT) algorithm, comparison threshold, decomposition threshold

摘要： 在正交频分复用(OFDM)系统中,信号的峰均功率比(PAPR)较高,导致发射端信号发生失真,为此提出了一种降低PAPR的算法。详细的介绍了在基带部分通过信号分解的方法将OFDM符号分解为两路信号以降低PAPR值,并验证了在不同的比较门限和分解门限下该方法对PAPR的改善程度。实验仿真结果证明,信号分解法在合理的比较门限和分解门限下能够在基带部分降低3dB~4dB的PAPR值。

关键词: 正交频分复用, 峰均功率比, 交替分解算法, 比较门限, 分解门限

CLC Number:

TN911.7

TONG Yinghua GENG Shengling. Signal decomposition algorithm for reducing peak-to-average power ratio of OFDM[J]. Journal of Computer Applications, 2013, 33(09): 2460-2462.

童英华耿生玲. 信号分解法降低OFDM符号峰均功率比的算法[J]. 计算机应用, 2013, 33(09): 2460-2462.

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Signal decomposition algorithm for reducing peak-to-average power ratio of OFDM

信号分解法降低OFDM符号峰均功率比的算法

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