| 可见光通信中自适应DFT-spread-OFDM性能研究 |
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| 引用本文： | 邓锐,范起瑞,董欢,何晶,陈林.可见光通信中自适应DFT-spread-OFDM性能研究[J].光电子．激光,2015,26(5):877-882. |
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| 作者姓名： | 邓锐 范起瑞 董欢 何晶 陈林 |
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| 作者单位： | 湖南大学 信息科学与工程学院;湖南大学 信息科学与工程学院;湖南大学 信息科学与工程学院;湖南大学 信息科学与工程学院;湖南大学 信息科学与工程学院 |
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| 摘 要： | 综合考虑可见光通信(VLC)中LED灯调制带宽受限及 非线性效应等问题,提出采用离散 傅里叶变换(DFT)-spread-OFDM与自适应调制OFDM相结合的一种自适应DFT-spread-OFDM ,保证通信可靠性的同时, 提高通信速率,通过仿真与实验相结合的方式,研究对比了自适应DFT-spread-OFDM与常 规 DFT-spread-OFDM及常规自适应调制OFDM之间的优劣。仿真和实验结果表明,自适应 DFT-spread-OFDM,能够取得良好的综合性能,较常规DFT-spread-OFDM能够实现更高速 率的通信,较常规自适应调制OFDM能够取得更佳的峰均功率比的(PAPR,peak-average power radio)性能。
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| 关 键 词： | 正交频分复用(OFDM) 自适应调制 可见光通信(VLC) |
| 收稿时间： | 2014/12/21 0:00:00 |
Research on application of adaptive DFT-spread-OFDM in visible light communication |
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| Affiliation: | Key Labroatory for Micro/Nano Optoelectronic Devices of Ministry of Education,C ollege of Computer Science and Electroic Engineering,Hunan University,Changsha 410082,China;Key Labroatory for Micro/Nano Optoelectronic Devices of Ministry of Education,C ollege of Computer Science and Electroic Engineering,Hunan University,Changsha 410082,China;Key Labroatory for Micro/Nano Optoelectronic Devices of Ministry of Education,C ollege of Computer Science and Electroic Engineering,Hunan University,Changsha 410082,China;Key Labroatory for Micro/Nano Optoelectronic Devices of Ministry of Education,C ollege of Computer Science and Electroic Engineering,Hunan University,Changsha 410082,China;Key Labroatory for Micro/Nano Optoelectronic Devices of Ministry of Education,C ollege of Computer Science and Electroic Engineering,Hunan University,Changsha 410082,China |
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| Abstract: | In this paper,considering the limited modulation bandwidth of LED in visible light communication (VLC) and the nonlinear effect of the LED,the technology combining the discrete Fourier transf orm (DFT)-spread technology with adaptively modulated orthogonal frequency divi sion multiplexing (OFDM) technology,adaptive DFT-spread-OFDM is proposed in this paper for getti ng both relatively high rate and reliable communication.Through the simulation and the experiment,a comprehensi ve comparison is made among adaptive DFT-spread-OFDM scheme,conventional DFT-spread-OFDM scheme and c onventional adaptively modulated OFDM scheme.In the simulation,the peak-to-average power ratio (PAPR) complementary cumulative dist ribution functions (CCDFs) of different system schemes are measured.In the exper iment,the bit error ratio (BER) performances of different system schemes are measured for a further comparison.In addition,the comparisons of the system complexity and the system communication r ate are made among different system schemes.The results indicate that adaptive DFT-spread-OFDM scheme can achieve higher rate compared with the conventional DFT-spread-OFDM scheme,and can achieve better PAPR performance compared with conventional adaptively modulated OFDM scheme.It has b een verified that the proposed adaptive DFT-spread-OFDM scheme can achieve good comprehensive perfor mance. |
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| Keywords: | orthogonal frequency division multipl exing (OFDM) adaptive modulation visible light communication (VLC) |
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