Downconvertion and error control system based on concatenated code are the critical part of the leo spread spectrum communication system , and are widely used in the communication system 下变频和基于级联码的差错控制系统是该特种小卫星扩频通信系统的关键部分,并且在通信系统中有着广泛地应用。
Conventionally , dtv systems adopt coding schemes such as rs or convolutional codes , or concatenated codes , where the error correction performance is still quite far away from the shannon limit 通常的,数字电视系统采用的信道编码方案为rs码或卷积码,或二者的级联码,它的纠错性能与香农极限相比,仍有一定的距离。
Furthermore , this paper analyzes the error control system based on concatenated code , mainly including the formation , encoding , decoding of rs code and convolutional code , interleaving , and deinterleaving 本文同时也就基于级联码的差错控制系统设计作了分析,主要包括rs码和卷积码的构成、编码、译码、交织和去交织。
The performance bounds and design criteria for hccc are developed . the result for hccc is extended to generalized concatenated coding . encoder , decoder structure and design criteria of generalized concatenated coding are studied 将结果推广到广义的级联卷积编码中,分析了广义级联卷积编码的编码结构、译码算法和设计准则。
With the developments of the concatenated codes and turbo codes reviewed , the serially concatenated convolutional codes that are the serial counterpart of the turbo codes are introduced firstly in this paper 本文在对级联码发展历史和turbo码简要介绍的基础上,着重研究了串行级联卷积码( sccc )和串行级联网格编码调制( sctcm )的编译码方法、纠错性能和设计原则。