| 限幅SLM算法降低DD-OFDM系统PAPR的研究 |
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| 引用本文： | 姚超,童峥嵘,曹晔,杨秀峰.限幅SLM算法降低DD-OFDM系统PAPR的研究[J].光通信技术,2012,36(1):32-35. |
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| 作者姓名： | 姚超 童峥嵘 曹晔 杨秀峰 |
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| 作者单位： | 天津理工大学计算机与通信工程学院,天津,300384 |
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| 摘 要： | 提出了限幅SLM(Selected Mapping)算法降低直接检测光正交频分复用系统(DD-OFDM)的峰均功率比(peak-to-average power ratio,PAPR).SLM算法降低了PAPR出现的概率,但并不能完全限制高PAPR.限幅SLM算法在传统SLM算法基础上对高PAPR信号进行限幅运算,进而将PAPR控制在所需要的范围内,相对限幅算法又改善了系统误码率性能.该算法可以控制高PAPR,进而降低光信号的功率,其有效性在DD-OFDM系统信道仿真中得到证实.
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| 关 键 词： | 直接检测光正交频分复用 峰均功率比 SLM算法 限幅算法 |
The research on reducing the PAPR of DD-OFDM with clipping SLM algorithm |
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| YAO Chao
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TONG Zheng-rong
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CAO Ye
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YANG Xiu-feng.The research on reducing the PAPR of DD-OFDM with clipping SLM algorithm[J].Optical Communication Technology,2012,36(1):32-35. |
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| Authors: | YAO Chao TONG Zheng-rong CAO Ye YANG Xiu-feng |
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| Affiliation: | (School of Computer and Communication Engineering,Tianjin University of Technology,Tianjin 300384,China) |
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| Abstract: | A clipping SLM algorithm is proposed to reduce the peak-to-average power ratio(PAPR) in Direct-Detection Optical Orthogonal Frequency Division Multiplexing(DD-OFDM) system in this paper.Selected Mapping(SLM) algorithm reduces the probability of PAPR,but it can’t completely restrain the high power signal.Clipping SLM algorithm clips the high PAPR based on the traditional SLM algorithm,then it controls the PAPR within expected range,and it improves the BER of the system.The clipping SLM algorithm controls the PAPR well and then reduces the power of the light signal.And the new method is verified in the fiber channel simulation of DD-OFDM. |
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| Keywords: | DD-OFDM PAPR SLM algorithm clipping algorithm |
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