| 双信道光混沌通信系统的理论模型及性能研究 |
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| 引用本文： | 吴加贵,吴正茂,林晓东,张毅,钟东洲,夏光琼.双信道光混沌通信系统的理论模型及性能研究[J].物理学报,2005,54(9):4169-4175. |
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| 作者姓名： | 吴加贵 吴正茂 林晓东 张毅 钟东洲 夏光琼 |
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| 作者单位： | 西南师范大学物理学院, 重庆 400715 |
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| 基金项目： | 重庆市自然科学基金和西南师范大学博士基金资助的课题. |
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| 摘 要： | 针对一种新型的双信道光混沌通信系统实验方案，建立了描述其工作特性的理论模型；通过 数值模拟结果与报道的实验结果的比较，证实了该理论模型的合理性. 利用该模型，基于小 信号微扰理论，推导出了激光器传输函数的表达式；研究了信号能在系统中很好传递对系统 参量的要求；定量地分析了信道干扰对系统同步性能的影响. 对250MHz的调制信号在系统中 的传输和解调进行了数值研究，结果表明，信号在传输过程中能得到很好的隐藏，且在输出 端易于解调.
关键词：
光混沌通信
双信道
传输函数
信道干扰
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| 关 键 词： | 光混沌通信 双信道 传输函数 信道干扰 |
| 文章编号： | 1000-3290/2005/54(09)/4169-07 |
| 收稿时间： | 1/4/2005 12:00:00 AM |
| 修稿时间： | 2005-01-042005-01-31 |
Theoretical model and characteristics investigations of dual-channel optical chaotic communication system |
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| Wu Jia-Gui,WU Zheng-mao,LIN Xiao-dong,Zhang Yi,Zhong Dong-Zhou,XIA Guang-qiong.Theoretical model and characteristics investigations of dual-channel optical chaotic communication system[J].Acta Physica Sinica,2005,54(9):4169-4175. |
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| Authors: | Wu Jia-Gui WU Zheng-mao LIN Xiao-dong Zhang Yi Zhong Dong-Zhou XIA Guang-qiong |
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| Abstract: | A theoretical model characterizing a recent experiment of dual-channel optical chaotic communication has been presented, and is proved to be reasonable by comparing the numerical simulation with the experimental results. After deducing the transmission function of semiconductor laser by small-signal analysis, how toreasonably select the system parameters in order to realize the effective transmission of signal has been specified. Moreover, the cross talk between two channels has been analyzed quantitatively. For a 250MHz modulation message, the nume rical simulation shows that it can be hidden efficiently during the transmission in the system and decoded easily. |
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| Keywords: | optical chaotic communication dual-channel transmission function cross talk between two channels |
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