| 基于单边带调制的直接探测光OFDM-RoF系统研究 |
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| 引用本文： | 王照,马健新,张瑞姣,李艳杰,张齐齐,张琦,刘人豪,余建国.基于单边带调制的直接探测光OFDM-RoF系统研究[J].光电子．激光,2014(9):1709-1714. |
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| 作者姓名： | 王照 马健新 张瑞姣 李艳杰 张齐齐 张琦 刘人豪 余建国 |
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| 作者单位： | 北京邮电大学 电子工程学院,北京 100876;北京邮电大学 电子工程学院,北京 100876;北京邮电大学 电子工程学院,北京 100876;北京邮电大学 电子工程学院,北京 100876;北京邮电大学 电子工程学院,北京 100876;北京邮电大学 电子工程学院,北京 100876;北京邮电大学 电子工程学院,北京 100876;北京邮电大学 电子工程学院,北京 100876 |
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| 基金项目： | 国家自然科学基金(6120115,61275158,61377079)、新世纪优秀人才支持计划(NECT-11-0595)和中央高校基本科研业务费专项基金(2013RC0209)资助项目 (北京邮电大学 电子工程学院,北京 100876) |
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| 摘 要： | 研究基于单边带调制(SSB)的直接探测光正交频分复用-光载射频(OFDM-RoF)系统的性能。10Gbit/s的二进制数据信号经过QAM符号映射和OFDM调制后,与10GHz射频信号混频并驱动双电极LiNbO3马赫-曾德尔调制器(LN-MZM)产生SSB-OFDM信号,调制信号通过光纤传输至基站,进行直接探测转换为毫米波电信号后再无线发送到用户端。仿真结果证实,OFDMRoF系统在4QAM和16QAM两种调制格式下的EVM都满足FEC的要求。同时,理论分析并仿真验证存在一个最佳调制指数可以使信号传输性能达到最佳,并且最佳调制指数与光纤长度无关。
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| 关 键 词： | 光载射频(RoF) 正交频分复用(OFDM) 单边带(SSB)调制 调制指数 |
| 收稿时间： | 1/6/2014 12:00:00 AM |
Study on direct detection optical OFDM-RoF system based on single-sideband mod ulation |
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| Affiliation: | College of Electronic Engineering,Beijing University of Posts and Telecommunica tions,Beijing 100876,China;College of Electronic Engineering,Beijing University of Posts and Telecommunica tions,Beijing 100876,China;College of Electronic Engineering,Beijing University of Posts and Telecommunica tions,Beijing 100876,China;College of Electronic Engineering,Beijing University of Posts and Telecommunica tions,Beijing 100876,China;College of Electronic Engineering,Beijing University of Posts and Telecommunica tions,Beijing 100876,China;College of Electronic Engineering,Beijing University of Posts and Telecommunica tions,Beijing 100876,China;College of Electronic Engineering,Beijing University of Posts and Telecommunica tions,Beijing 100876,China;College of Electronic Engineering,Beijing University of Posts and Telecommunica tions,Beijing 100876,China |
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| Abstract: | An orthogonal frequency-division multiplexing radio-over-fiber (OFDM-RoF) sy stem based on single sideband (SSB) modulation and direct detection is proposed and simulated.The 10-Gbit/s binary data signal is mapped by quadrat ure amplitude modulation (QAM) and modulated as the baseband OFDM signal which is mixed with the 10GHz radio frequency (RF) clock.The RF OFDM signal then drives the dual-elect rode LiNbO3Mach-Zehnder modulator (LN-MZM) to generate the optical SSB-OFDM signal which is transmitte d to base station (BS) over standard single-mode fiber (SMF) and broadcast by antenna to user terminals. The simulation results demonstrate that the error vector magnitudes (EVMs) of th e 4QAM- and 16QAM-OFDM s ignals are much below the forward error correction (FEC) limits.Meanwhile,the th eoretical analysis and simulation are preformed to verify that an optimum modulation index exists,which can bring on optimum transmission performance regardless of the fiber length. |
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| Keywords: | radio-over-fiber (RoF) orthogonal frequency-division multiplexing (OFDM) single sideband (SSB) modulation modulation index |
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