译码的

The belief-propagation iterative decoding algorithm with the most computational complexity is combined with algebraic decoding algorithm to form hybrid decoding.

研究了高复杂度的BP迭代译码和快速简单的传统代数译码方法结合的译码性能。

And algebraic decoding based on the algebraic structure, and probability decoding includes sequence decoding and Viterbi decoder.

卷积码的译码算法可以分为代数译码和概率译码，代数译码基于代数结构，概率译码有序列译码与维特比译码。

Comparing to other Per Carrier technologies, Viterbi decoder has its own specialties in OFDM system, it means frequency domain response coefficient obtained under the condition of channel equalization can provide decoding algorithm with weight for decision, which is called CSI Viterbi Algorithm.

与其他单载波调制技术相比，OFDM系统巾的Viterbi译码有其特别之处。可以根据在信道均衡时所得到的信道频域响应系数为译码算法提供判决权重，被称为CSI Viterbi译码算法。

Firstly, the M-ary modulated Min-Sum algorithm which based on Maximum Liklihood is provided, however, can not be applied to actual decoding due to its complexity. By applying the so called Generalized Distributive Law, we simplified the Min-Sum decoding for M-ary modulated LDPC codes based on Maximum Likelihood, and obtained what we called Enhanced Min-Sum algorithm.

首先基于最大似然的原理给出了多进制调制下的Min-Sum算法，然后利用广义分配率的原理对基于最大似然译码的多进制Min-Sum算法进行了简化，首次提出了多进制调制下LDPC码的改进Min-Sum算法。

Since soft-decision decoding needs much more computation, it is so complex as to be infeasible in many applications.

但是软判决译码比硬判决译码要进行更多的译码计算，复杂度较高，从而限制了它的应用范围。

To lower power consumption in Turbo decoding , a new algorithm based on trellis combination was proposed.

针对Turbo 码译码器功耗大的问题，改进了传统的最大后验概率译码算法，提出了一种基于网格图合并思想的低功耗Turbo 码译码算法。

The paper describes a new iterative decoding algorithm for the product codes, its feedback method is completed by a linear combination of soft output of encoder and the receipt information is different with the traditional turbo iterative decode. When decoder obtains the soft output matrix built -1 and +1, the complexity can be reduced greatly and the performance can be lost utile by reducing the number of candidate code words and omitting the complicated operation of LLR.

针对乘积码提出一种新的迭代解码算法，该算法的反馈方式有别於Turbo码的传统迭代译码，是通过输出软信息与接收软信息进行线性叠加来实现的，此时子译码器的候选码字个数将大为降低，同时译码输出也无须做复杂的LLR计算，直接映射为由-1，+1组成的软输出矩阵，从而在牺牲较小性能的情况下很大程度地降低了译码复杂度。

The decoding precesses are discussed in term of Hamming codes. The result shows that the applied field of the ma...

结果表明，这种译码方法可拓宽大数逻辑译码法的应用范围，简化译码设备，具有一定实用意义。

This paper introduced code theory and the common RS codec algorithm, the implementation of RS encoder, then detailedly analyse the decoder realization of BM algorithm and ME algorithm, then bring forward implementation and improvement of a pipeline structure errors and erasures correcting RS decoder on ME algorithm, compromise the decoder complexity and delay to reduce the complexity and raise the maximum operating frequency. Finite-field multipliers optimize codec circuit.

本文首先介绍了编码理论和常用的RS编译码算法，提出RS编码器实现方案，详细分析了译码器的ME算法和改进BM算法的实现，针对ME算法提出了一种流水线结构的纠删纠错RS译码器实现方案，在译码器复杂度和延时上作了折衷，降低了译码器的复杂度并提高了最高工作频率，利用有限域乘法器的特性对编译码电路进行优化。

Due to the smart adjustment, our decoding algorithm, on one hand can break the symmetric degeneracy, and on the other hand can feed back more useful information to the SPA decoder to help the decoder determine a valid output, thereby significantly improving the decoding ability of the decoder.

我们的反馈式策略起到了经典译码中的软判决技术的作用，不但克服了对称简并问题带来的不利影响，更重要的是还给译码器提供了更多的有效信息，从而大大提高了译码器的纠错译码能力。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。