卫星ATM网络应用RS和Turbo级联码的仿真分析

为适应卫星ATM传输提出了RS(Reed Solomon)码和Turbo码的级联码.RS码是线性分组码中纠突发错误能力最强、效率最高的编码,广泛地被卫星通信信道采用;而Turbo码是新近提出的,可以接近香农限的卓越编码方案,它使用2个反馈递归系统卷积(Recursive Systematic Convolutional,RSC)码组成的码;校验位删减成要求的码率.卫星ATM的标准TIA/EIA/IS-787]中规定,前向纠错码(Forward Error Correction,FEC)采用动态和适当的RS编码.用RS和Turbo级联码代替了RS码.仿真结果表明,RS和Turbo级联码的性能比同样码率的RS和Convolutional的级联码在一定信噪比下有大约1dB的增益.

Simulation Analysis of Applying Concatenated RS and Turbo Code to Satellite ATM

In this paper,the concatenated RS (Reed Solomon) and Turbo coding is proposed for the satellite ATM transmission.The RS code has the strongest error-correcting ability and the highest efficiency in linear block codes for correcting burst error,and has been widely used in satellite communication channel.The Turbo code proposed recently is the most excellent coding scheme which can be near the Shannon' limit.It uses 2 recursive systematic convolutional (RSC) code as the constituent codes and parity bit are punctured to get the desired code rate.The interim standard TIA/EIA/IS-787] of the satellite ATM for forward error correction (FEC) adopts a method of dynamic and adaptive RS coding.This paper replaces the adaptive RS code with the concatenated RS code and Turbo code for forward error correction.It is shown by simulation that the concatenated RS code and Turbo code obtains about 1 dB gain in signal to noise ratio over the concatenated RS code and Convolutional code with the same code rate for satellite ATM transmission.