LDPC码译码失败及抗突发误码研究

介绍了LDPC码的基本原理和理论基础,运用计算机仿真等手段,对译码中的译码失败情况、译码迭代次数进行了分析,并就存在强突发干扰的信道给出了一种改进译码方案.该方案舍弃了存在强干扰的码元位置的初始译码信息,避免了错误的初始信息参与译码迭代过程.仿真结果证实,在强突发干扰的情况下,改进方案明显优于原始的BP算法.

Study on LDPC Decoding Failure and Anti-error-burst Performance

The basic theory about LDPC code is introduced in this paper. Decoding failure and decoding times in the decoding progress is analyzed by computer simulation, and an improved decoding method applied to channels with strong bursting jam is presented. The improved method discards the initial decoding information corresponding to the element position with strong jam so as to avoid the wrong information participating in the iterative decoding. The computer simulation result shows that the improved method is better than original BP algorithm when strong jam exists.