| 一种适用于BPSK编码远距离传输的局部预加重方法 |
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| 引用本文： | 孙华娟,颜晓红,郝学元.一种适用于BPSK编码远距离传输的局部预加重方法[J].电视技术,2014,38(13). |
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| 作者姓名： | 孙华娟 颜晓红 郝学元 |
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| 作者单位： | 南京邮电大学,南京邮电大学,南京邮电大学 |
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| 基金项目： | 国家高技术研究发展计划（863计划） |
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| 摘 要： | 在长距离同轴电缆数据传输过程中，由于信号传输的趋附效应及信道带宽的限制，传输基带信号时，高频信号会被衰减，从而会产生严重的码间干扰，限制信号传输的速度。在不使用复杂电路的情况下，对一种基于时域脉冲宽度调制(PWM) 局部预加重技术进行研究，有效提高信号传输的速度，并以二进制相移键控(BPSK)编码信号为例，通过仿真给出了PWM预加重的最佳位置，并通过眼图观察预加重后的信号传输质量。仿真结果证明，用此方法可有效克服信号的码间干扰问题，大大延长BPSK信号在线缆中的传输的距离。
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| 关 键 词： | 数据传输，脉冲宽度调制，预加重，simulink |
| 收稿时间： | 2013/12/10 0:00:00 |
| 修稿时间： | 1/7/2014 12:00:00 AM |
A kind of method for BPSK code pre-emphasis of local long-distance transmission |
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| sun huajuan,yan xiaohong and hao xueyuan.A kind of method for BPSK code pre-emphasis of local long-distance transmission[J].Tv Engineering,2014,38(13). |
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| Authors: | sun huajuan yan xiaohong and hao xueyuan |
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| Affiliation: | Nanjing University of Post and Telecommunication,Nanjing University of Post and Telecommunication,Nanjing University of Post and Telecommunication |
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| Abstract: | In the process of the coaxial cable of the long-distance data transmission, skin effect of signal transmission and channel bandwidth limits cause attenuation of the high frequency component of the signals during base band signal transmission, therefore produce severe inter-symbol interference, and limit the speed of signal transmission. The paper proposes a new technique based on a Local Pulse-Width Modulation (PWM) pre-emphasis method, the method can improve the speed of signal transmission without using complex circuit. The paper gives a simulation result which can effectively eliminate the phenomenon of inter-symbol interference, extend the the cable transmission distance. |
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