| 全光纤位移干涉测速系统中小波基的选取研究 |
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| 引用本文： | 董毅,赵尚弘,倪延辉,田晓飞,蒋馥蔚.全光纤位移干涉测速系统中小波基的选取研究[J].激光技术,2012,36(2):247-250. |
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| 作者姓名： | 董毅 赵尚弘 倪延辉 田晓飞 蒋馥蔚 |
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| 作者单位： | 1.电子科技大学 光电信息学院 成都 610054; |
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| 摘 要： | 为了使全光纤位移干涉测速系统能够准确稳定地测速,采用小波基分析问题的方法,对全光纤位移干涉测速仪信号进行了理论分析,并选取6种小波基函数进行计算机模拟,选定了适合全光纤位移干涉测速仪信号分析方法的最优小波基。与此同时,分别利用自由落体运动实验和高速爆轰实验验证了系统的精确性和稳定性,精确度达到99%,稳定性极高。结果表明,最优小波基的选取是合理的。
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| 关 键 词： | 激光技术 最优小波基 计算机模拟 小波变换 信号处理 |
| 收稿时间： | 2011/7/21 |
Effect of third-order dispersion on the transmission property of PSNRZ code |
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| DONG Yi
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ZHAO Shang-hong
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NI Yan-hui
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TIAN Xiao-fei
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JIANG Fu-wei.Effect of third-order dispersion on the transmission property of PSNRZ code[J].Laser Technology,2012,36(2):247-250. |
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| Authors: | DONG Yi ZHAO Shang-hong NI Yan-hui TIAN Xiao-fei JIANG Fu-wei |
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| Affiliation: | (Telecommunication Engineering Institute,Air Force Engineering University,Xi’an 710077,China) |
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| Abstract: | In order to study the influence of third-order dispersion (TOD) on transmission property of phase-shaped nonreturn-to-zero (PSNRZ) codes, the effect of TOD on the Gaussian pulse with initial chirps was simulated at first, and it was found that the initial chirps could greatly aggravate the effect of TOD on the shape evolution. Then the transmission characteristics of the PSNRZ codes were simulated, and it was found that the transmission distance of PSNRZ codes might decrease severely if the TOD was not compensated, the decreased distance was even longer than 500km when the remained group-velocity dispersion(GVD)was below 20ps/nm. The results show that the TOD must be compensated in the case that PSNRZ code is used. |
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| Keywords: | fiber optics phase-shaped nonreturn-to-zero code third-order dispersion chirps |
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