| 基于Turbo码的PCM／FM再入遥测系统性能分析 |
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| 引用本文： | 季艳中,赵泽茂,曹海燕.基于Turbo码的PCM／FM再入遥测系统性能分析[J].机电工程,2009,26(12):54-57. |
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| 作者姓名： | 季艳中 赵泽茂 曹海燕 |
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| 作者单位： | 杭州电子科技大学,通信工程学院,浙江,杭州,310018 |
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| 基金项目： | 国家自然科学基金委与中国工程物理研究院联合基金NSAF资助项目 |
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| 摘 要： | 针对Turbo码对PCM／FM再入遥测系统性能的影响，在遥测信道中实现了系统的仿真。首先介绍了Turbo码的编译码原理；再详细地介绍了一种产生莱斯衰落的方法；最后将Turbo码和PCM／FM系统结合，在莱斯衰落信道上进行了仿真。仿真结果表明，在遥测信道中，基于Turbo码的PCM／FM再入遥测系统与未编码的遥测系统相比较，其编码增益达到了8dB，大大提高了其在传输条件恶劣情况下的抗误码性能。
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| 关 键 词： | Turbo PCM/FM 莱斯衰落 |
Performance analysis of PCM/FM reentry telemetry system based on Turbo codes |
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| JI Yan-zhong,ZHAO Ze-mao,CAO Hai-yan.Performance analysis of PCM/FM reentry telemetry system based on Turbo codes[J].Mechanical & Electrical Engineering Magazine,2009,26(12):54-57. |
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| Authors: | JI Yan-zhong ZHAO Ze-mao CAO Hai-yan |
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| Affiliation: | ( School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China) |
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| Abstract: | Aiming at the impact of Turbo code on the PCM/FM reentry telemetry system, the performance of the system was simulated in the telemetry channel. Firstly, the principle of Turbo encoder and decoder was introduced. Secondly, a method of generating rice fading was given in detail. Finally, the Turbo code were combined with PCM/FM system and simulated in Rice fading channel. The results show that in the telemetry channel, the PCM/FM reentry telemetry system based on Turbo codes has 8 dB coding gain compared to the non-coding telemetry system, which greatly improves the performance of anti-BER in bad transmission conditions. |
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| Keywords: | Turbo PCM/FM |
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