| 改进的16进制正交幅度调制码的相位估计算法 |
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| 引用本文： | 樊弋,张晓光,席丽霞,张文博.改进的16进制正交幅度调制码的相位估计算法[J].光电子．激光,2011(12):1802-1806. |
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| 作者姓名： | 樊弋 张晓光 席丽霞 张文博 |
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| 作者单位： | 北京邮电大学信息光子学与光通信教育部重点实验室;北京邮电大学信息光子学与光通信教育部重点实验室;北京邮电大学信息光子学与光通信教育部重点实验室;北京邮电大学信息光子学与光通信教育部重点实验室 |
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| 基金项目： | 国家自然科学基金资助项目(60977049);北京邮电大学青年专项基金资助项目(BUPT2009RC0413) |
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| 摘 要： | 相干光通信系统中的相位恢复是克服信号收发端和传输过程中产生的相位噪声的必要步骤。为获得低的运算复杂度和良好的相位估计效果，本文对传统的四次方相位估计算法进行了改进，使之具有自适应的数据块长度控制功能。通过理论分析以及Matlab数值仿真方法验证改进的效果。对于16进制正交幅度调制码（16QAM），改进后的算法在几乎不增...
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| 关 键 词： | 16进制正交幅度调制码(16QAM) 相干检测 相位估计 四次方算法 激光器线宽 |
Modified phase estimation algorithm for square-16QAM |
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| FAN Yi,ZHANG Xiao-guang,XI Li-xia and ZHANG Wen-bo.Modified phase estimation algorithm for square-16QAM[J].Journal of Optoelectronics·laser,2011(12):1802-1806. |
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| Authors: | FAN Yi ZHANG Xiao-guang XI Li-xia and ZHANG Wen-bo |
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| Affiliation: | Key Laboratory of Information Photonics and Optical Communications,Ministry of Education of China,Beijing University of Posts and Telecommunications,Beijing 100876,China;Key Laboratory of Information Photonics and Optical Communications,Ministry of Education of China,Beijing University of Posts and Telecommunications,Beijing 100876,China;Key Laboratory of Information Photonics and Optical Communications,Ministry of Education of China,Beijing University of Posts and Telecommunications,Beijing 100876,China;Key Laboratory of Information Photonics and Optical Communications,Ministry of Education of China,Beijing University of Posts and Telecommunications,Beijing 100876,China |
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| Abstract: | Phase estimation is very important for the coherent optical communication systems.A modified carrier phase recovery algorithm with overlap controlled adaptively for squared 16-QAM systems is proposed in this paper,which is based on the 4th-power algorithm and resolves the problem of block-size-choosing.We simulate the system with Matlab and demonstrate that by using this modified algorithm,the laser linewidth tolerance for 25 G baud 16-QAM system is enhanced by 1.8 MHz at the 10-3 BER level with 1 dB OSNR penalty,compared with the traditional 4th-power algorithm. |
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| Keywords: | 16QAM coherent detection phase estimation 4th-power algorithm laser linewidth |
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