| 16-QAM相干光纤通信系统星座图的优化与选择 |
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| 引用本文： | 刘继红,李佳泯,梁猛.16-QAM相干光纤通信系统星座图的优化与选择[J].半导体光电,2012,33(1):110-112,140. |
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| 作者姓名： | 刘继红 李佳泯 梁猛 |
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| 作者单位： | 西安邮电学院电子工程学院,西安,710121;西安邮电学院电子工程学院,西安,710121;西安邮电学院电子工程学院,西安,710121 |
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| 基金项目： | 陕西省教育厅科技计划项目，西安邮电学院博士基金项目 |
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| 摘 要： | 基于16-QAM的相干光纤通信系统其抗噪声能力与调制格式的星座图特征密切相关。文章分析了Star 16-QAM的星座图在各种圈比下受噪声影响的特性,通过数值计算获得了在不同噪声条件下星座图的最佳圈比。研究了Square和Star两种16-QAM对激光相位噪声的要求,分析结果表明,获得相同的BER性能时,Star 16-QAM由激光相位噪声引起的光信噪比代价更小。
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| 关 键 词： | 相干光通信 16-QAM 星座图 激光相位噪声 |
Constellation Optimization and Selection for 16-QAM Based Optical Coherent Systems |
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| LIU Jihong,LI Jiamin,LIANG Meng.Constellation Optimization and Selection for 16-QAM Based Optical Coherent Systems[J].Semiconductor Optoelectronics,2012,33(1):110-112,140. |
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| Authors: | LIU Jihong LI Jiamin LIANG Meng |
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| Affiliation: | (School of Electrical Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,CHN) |
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| Abstract: | The transmission performance of 16-QAM based optical coherent systems seriously depends on the constellation of modulation formats.In this paper,the effects of noise on Star 16-QAM under different ring ratios were analyzed,and the optimal ring ratios were obtained with different noise conditions.The requirements of laser phase noise for both Square and Star 16-QAM are analyzed,and the results show that Star 16-QAM has the smaller optical SNR penalty induced by laser phase noise at the same BER level. |
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| Keywords: | coherent optical communications 16-QAM constellation laser phase noise |
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