改进的LDPC码Normalized BP-Based译码算法  

Improved Normalized BP-Based decoding algorithm for low density parity check code

作　　者：张小花[1] 李艳萍[1] 

机构地区：[1]太原理工大学信息工程学院,太原030024

出　　处：《计算机应用》2012年第1期150-152,190,共4页journal of Computer Applications

摘　　要：为了提高Normalized BP-Based算法的译码性能,提出了一种改进的Normalized BP-Based算法。根据校验节点传向变量节点的信息的大小来动态地改变校正因子,实现对BP-Based算法的非线性补偿。仿真结果表明:在误码率低于0.5×10-2时,与Normalized BP-Based算法相比,改进算法均可以获得约0.1 dB的增益,而只增加少量运算,并且不增加迭代次数。To further improve the decoding performance of the Normalized BP-Based algorithm,an improved Normalized BP-Based algorithm was proposed.The correction factor was changed dynamically according the amount of the information from the check nodes to variable nodes in order to achieve non-linear compensation of BP-Based algorithm.The simulation results show that when the bit error rate was less than 0.5×10^-2,the improved algorithms could get about 0.1 dB gain,compared with Normalized BP-Based algorithm,only with slight increase in complexity,and the number of iterations did not increase.

关 键 词：低密度奇偶校验码 可变校正因子 非线性补偿 迭代译码 

分 类 号：TP911.22[自动化与计算机技术]