threshold decoding

The traditional decoding methods of convolutional code can be classified into two types: threshold decoding and probability decoding. The latter can be divided into sequential decoding and Viterbi algorithm.

卷积码的传统译码方法有两大类：一类是门限译码，另一类是概率译码，概率译码又分为序列译码和维特比译码。

Density evolution theory is specified and is applied to the analysis on the threshold of decoding, through which guidance can be provided to optimize irregular LDPC codes.

阐述了密度进化理论，并分析了译码过程中存在的阈值现象。然后介绍了密度进化理论在LDPC码优化方面的应用。

The result of the simulation shows that, in factor graph with cycles, the threshold of decoding obtained in scatter density evolution analysis is lower than that obtained in factor graph without cycles.

仿真实验结果显示，有环因子图下，其离散密度进化分析获得译码阈值低于无环因子图的情况。

The algorithm overcomes the threshold decoding algorithm shortcoming-too strict requirement for codes and narrow scope of application.

它克服了大数逻辑译码法存在的对码的要求过于严格，以及应用范围小的缺点。

The Principle of Information Threshold Detection Decoding and Its Application in the Theory of Error Bound

信息门限判决译码原理及其在误差界限理论中的应用