基于Turbo码的PCM/FM再入遥测系统性能分析*

作者：季艳中，赵泽茂，曹海燕 日期：2009-12-30/span> 浏览：2961 查看PDF文档

基于Turbo码的PCM/FM再入遥测系统性能分析*

季艳中，赵泽茂，曹海燕
（杭州电子科技大学 通信工程学院，浙江 杭州  310018）

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8 dB，大大提高了其在传输条件恶劣情况下的抗误码性能。
关键词：Turbo；PCM/FM；莱斯衰落
中图分类号：TP873.02文献标识码：A文章编号：1001-4551(2009)12-0054-04

Performance analysis of PCM/FM reentry telemetry system based on Turbo codes
JI Yanzhong, ZHAO Zemao, CAO Haiyan
（School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China）
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 noncoding telemetry system, which greatly improves the performance of antiBER in bad transmission conditions.
Key words: Turbo; PCM/FM; Rice fading
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