摘要
脉冲噪声是电力线通信中存在的最大障碍,造成信号的误码率(BER)高,必须考虑采用复杂的信道编码技术.低密度奇偶检验码(LDPC)是无线通信系统中最接近香农极限的纠错码,译码算法是针对无线信道的干扰而设计的.针对电力线信道存在的脉冲噪声,用A脉冲类噪声电力线信道模型,提出了一种改进的LDPC码译码算法.通过对改进的算法进行仿真,表明改进的LDPC算法大大提高了系统编码增益,可用于电力线宽带通信系统.
The impulse noise is the greatest barrier existed in power line communication,which can lead to high bit error rate(BER).It is necessary to consider adopting complicated channel coding technology.Low-density parity-check codes(LDPC)is most close to Shannon limit in the system of wireless communication,however it is designed according to the interference generated in wireless channel.This paper presented an improvement on decoding algorithm of LDPC in terms of the pulse noise existed in power line communicat...
出处
《微电子学与计算机》
CSCD
北大核心
2009年第2期171-173,共3页
Microelectronics & Computer
基金
国家"八六三"计划项目(2006AA09Z141)
关键词
A类脉冲噪声
低密度校验码
和-积译码
A pulse noise
low density parity check code（LDPC）
sum-product decoding
