| 基于分数阶傅里叶变换的OFDM系统峰均比探讨 |
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| 引用本文： | 王志岗,杨守义,穆晓敏.基于分数阶傅里叶变换的OFDM系统峰均比探讨[J].河南科学,2006,24(3):411-414. |
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| 作者姓名： | 王志岗 杨守义 穆晓敏 |
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| 作者单位： | 郑州大学,信息工程学院,郑州,450052 |
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| 摘 要： | 介绍了基于分数阶傅里叶变换的正交频分复用系统,推导了该系统中峰均功率比公式.探讨了该系统中使用选择映射法降低峰均比.在不同的分数阶域信号能量的聚集性不同,则其峰均比就不同;通过计算机仿真分析得到了在不同的分数阶数琢情况下系统的累积分布函数曲线,并与基于FFT的系统进行比较,实验结果表明当琢取最优值时,系统的峰均比互补累积函数性能优于基于FFT的系统性能.
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| 关 键 词： | 分数阶傅里叶变换 正交频分复用 峰值与均值功率比 选择映射 |
| 文章编号： | 1004-3918(2006)03-0411-04 |
| 收稿时间： | 2006-01-11 |
| 修稿时间： | 2006年1月11日 |
Discussion about Peak-to-average Power Ratio in OFDM System Based on Fractional Fourier Transform |
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| WANG Zhi-gang,YANG Shou-yi,MU Xiao-min.Discussion about Peak-to-average Power Ratio in OFDM System Based on Fractional Fourier Transform[J].Henan Science,2006,24(3):411-414. |
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| Authors: | WANG Zhi-gang YANG Shou-yi MU Xiao-min |
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| Institution: | College of Information Engineering, Zhengzhou University, Zhengzhou 450052, China |
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| Abstract: | In this paper,the OFDM system which is based on fractional Fourier transform(FRFT) has been introduced,and the function of peak-to-average power ratio(PAPR) is achieved.The selected mapping which lowers the PAPR of traditional OFDM system is employed for OFDM systems based on FRFT.Because the density of the signal power is different in different a domain,the PAPR of the signal isn't same.The figures of the complementary cumulative distribution function(CCDF) with different fractional angle have been drawn.Comparing with the system which is based on FFT,simulation results have shown good efficiency of proposed algorithm when the calculation is done in the optimal fractional domain. |
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| Keywords: | FRFT OFDM peak-to-average power ratio selected mapping |
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