pccc meaning in Chinese
后囊连续环形撕囊
Examples
- After that , due to its application of pccc in the third generation mobile communication system , the performance of pccc in fading channel is considered
另外，考虑到pccc码在移动通信系统中的应用，研究了衰落信道相关性对pccc码纠错性能的影响。 - In the first part of this thesis , the iterative process structure which is based on the extrinsic information exchange between the siso ( soft in soft out ) component decoders of pccc ( parallel concatenated convolutional codes ) is discussed
首先以并行级联卷积码( pccc )为对象详细的讨论了分量码的软输入软输出( siso )算法和在此基础上基于外信息交换的迭代解码算法。 - The simulation result shows that : the performance of the proposed scheme is improved with comparison to pccc and sccc on both awgn channel and the rayleigh fading channel . in awgn channel , it is about same if the snr is low , if the snr is high , the improvement is 0 . 2 ~ 0 . 5db
结果表明：本方案的误码率性能与并行级联码和串性行级联码相比，在高斯白噪声信道上，低信噪比时几乎相同，高信噪比时有0 . 2 0 . 5db的改善。 - In chapter 1 , a survey of ccc and stc , including their development is presented . in chapter 2 , encoder structure , decoder structure and interleaver of parallel concatenated convolutional code ( pccc ) and serially concatenated convolutional code ( sccc ) are studied . symbol - wise siso algorithm and bit - wise siso algorithm are given
在第二章中，系统分析了并行级联卷积编码和串行级联卷积编码的编码结构、交织器的类型、译码结构以及基于符号和基于比特的siso算法。 - Turbo codes represent the new code structures , which consist of pccc ( parallel serially convolutional code ) and sccc ( serially concatenated convolutional code ) . in this paper , the background of turbo codes are firstly introduced , which includes the base principle of error correction code 、 block code and convolutional code ; the principle of turbo code and the iterative decoding is secondly expanded ; the key decoding algorithm : a revised map algorithm and iterative decoding theory are detailed ; then , a new turbo code structure : hccc ( hybrid concatenated convolutional code ) is presented , and the capacity of this code method is analyzed , the average capacity upper bound is derived ; at last , this code is simulated on awgn ( additive white gaussian noise ) channel and rayleigh fading channel
本文首先介绍了turbo码的背景知识，包括差错控制的基本原理、分组码和卷积码；然后阐述了turbo码的基本原理，包括turbo编译码器结构及迭代译码原理；较为详细地描述了关键的译码算法： ?种改进的最大后验概率( map )译码算法及迭代译码算法；提出了一种新的turbo码结构：混合turbo码(混合级联卷积码) ；并用编码性能联合界分析方法对混合turbo码进行了性能分析，得出了其平均性能上界；并在高斯白噪声信道和瑞利衰落信道上分别作了一些应用研究及计算机仿真实验。