| Turbo码在光PPM通信系统中的性能分析 |
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| 引用本文： | 周海燕,敖发良. Turbo码在光PPM通信系统中的性能分析[J]. 桂林电子科技大学学报, 2002, 22(3): 1-4 |
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| 作者姓名： | 周海燕 敖发良 |
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| 作者单位： | 桂林电子工业学院,通信与信息工程系,广西,桂林,541004 |
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| 基金项目： | 广西区自然基金资助项目 ( 9912 0 0 7) |
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| 摘 要： | 光 PPM通信具有很多优点但容易受到外界的干扰。由于 Turbo码具有较好的纠错性能 ,因此希望在光 PPM通信中采用 Turbo码来提高系统性能。而最初提出的 Turbo码的译码算法是在加性白高斯噪声 (AWGN)信道下进行推导的 ,若将 Turbo码用于光 PPM系统 ,就要根据光信道、光接收机及PPM调制的特点重新推导译码算法。通过以 2 5 6时隙的 PPM为例对 Turbo码的译码算法进行了推导 ,模拟结果表明将 Turbo码用于光 PPM通信系统的确能取得较好的纠错能力。
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| 关 键 词： | PPM 光通信 Turbo码 |
| 文章编号： | 1001-7437(2002)03-01-04 |
| 修稿时间： | 2002-03-05 |
The Performance of Turbo Codes in Optical PPM Communication Systems |
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| ZHOU Hai-yan,AO Fa-liang. The Performance of Turbo Codes in Optical PPM Communication Systems[J]. Journal of Guilin University of Electronic Technology, 2002, 22(3): 1-4 |
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| Authors: | ZHOU Hai-yan AO Fa-liang |
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| Abstract: | Optical PPM communication systems have many advantages, but they are liable to interference. Turbo codes have outstanding performances, and are used in optical PPM communication to improve the performance of systems.But the original decoding algorithms of Turbo codes are proposed under the additive white Gaussian noise(AWGN) channels conditions. If Turbo codes are used in optical PPM systems, the decoding algorithms must be deduced over again in terms of the characteristic of optical channels,optical detector and PPM modulation. The decoded algorithm of Turbo codes in 256-ary PPM as an example is given and the result of simulation shows that Turbo codes have a good correction capability in PPM optical communication systems. |
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| Keywords: | PPM optical communication Turbo code |
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