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。
First, the paper briefly introduces theories of convolutional coding, viterbi decoding algorithm and rake receiver . then, the paper focuses on methods to implement viterbi decoder and rake receiver in fpga 本文简要介绍了卷积码、viterbi译码和rake接收机的原理,详细描述了在fpga中实现viterbi译码和rake接收机的方法。
Therefore, during system design, cascade coding combining reed-solomon codes and convolutional codes is utilized; in addition, time-direction and frequency-direction interleaves are added to alleviate channel fading 因此在进行系统设计时,采用了rs码与卷积码的级联编码方案,并同时加入时间交织和频率交织来对抗信道衰落。
The mainly work is as follows : 1 . aiming at the systemic convolutional code prescribed in the intelsat iess 309 standard we bring forward a kind of actual method and implement the encoder with programming language 本文所做的主要工作如下:1、针对iess309协议中所规定的系统卷积码,研究了一种实际的编码方法,并编程实现其编码。
Both quantum error correcting code and quantum error avoiding code are practical quantum channel coding schemes . we present in this dissertation a new quantum error correcting code scheme, named serially concatenated quantum convolutional code 克服量子信道噪声的编码就称为量子信道编码,实用的量子信道编码包括量子纠错码和量子避错码。
The iess 309 standard indicates two decoding methods, we focus on the systemic convolutional code with long encoding restriction which is 36 bit and adopt the fano sequential decoding algorithm to implement the decoder 在协议中规定了两种译码的方式,我们主要是针对编码约束度为36的系统卷积码,采用fano序列译码算法来实现其译码,并进行了仿真。
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。
(2, 1, 7 ) nonsystematic convolutional codes are optimal convolutional codes on the same code length and information bit length condition, so they are adopted as space standard codes by ccsds ( consultative committee for space data systems ) (2,1,7)非系统卷积码在相同的码长和信息长度下为最佳卷积码,因此被ccsds(空间数据系统咨询委员会)采纳为空间标准码。
(2, 1, 7 ) nonsystematic convolutional codes are optimal convolutional codes on the same code length and information bit length condition, so they are adopted as space standard codes by ccsds ( consultative committee for space data systems ) (2,1,7)非系统卷积码在相同的码长和信息长度下为最佳卷积码,因此被ccsds(空间数据系统咨询委员会)采纳为空间标准码。
Convolutinal coding is a coding scheme often employed in digital wireless communications . viterbi decoders are used to decode convolutional codes . viterbi decoders employed in digital wireless communications are complex and dissipate large power 卷积码是一类重要的前向纠错编码,它编码简单,易于实现最佳译码,是当今无线数字通信系统的一个十分重要的组成部分。