基于Turbo码的PCM/FM再入遥测系统性能分析  

Performance analysis of PCM/FM reentry telemetry system based on Turbo codes

作　　者：季艳中[1] 赵泽茂[1] 曹海燕[1] 

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《机电工程》2009年第12期54-57,共4页Journal of Mechanical & Electrical Engineering

基　　金：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(10776007)

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。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.

关 键 词：TURBO PCM/FM 莱斯衰落 

分 类 号：TP873.02[自动化与计算机技术—检测技术与自动化装置]