| 针对信息节点振荡特性的改进LDPC译码方法 |
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| 引用本文： | 邝文,赵刚,王燕.针对信息节点振荡特性的改进LDPC译码方法[J].科学技术与工程,2009,9(6). |
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| 作者姓名： | 邝文 赵刚 王燕 |
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| 作者单位： | 四川大学电子信息学院,成都,610064 |
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| 摘 要： | 在中高信噪比情况下,信息节点值在译码迭代中可能出现在0和1之间振荡的情况,从而使最终的误比特率上升.针对这种情况,提出了将出现振荡情况且初始软信息较小的信息节点所携带的初始信息认定为不可靠并忽略掉的改进译码算法,有效的降低了误比特率.对码长为504 bit码率为2/3的LDPC非规则规则码进行了仿真实验,在Eb/N0为0.5 dB到2.5 dB的范围内均能取得优于传统BP译码算法0.3 dB的增益.
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| 关 键 词： | 信息节点 振荡低密度奇偶校验码(Low Density Parity Check LDPC) 译码 |
Modified LDPC Decoding Algorithm with Fedback |
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| KUANG Wen,ZHAO Gang,WANG Yan.Modified LDPC Decoding Algorithm with Fedback[J].Science Technology and Engineering,2009,9(6). |
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| Authors: | KUANG Wen ZHAO Gang WANG Yan |
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| Institution: | School of Electronics and Information Engineering;Chengdu 610064;P.R.China |
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| Abstract: | Massage bit probability may oscillate between 0 and 1 in iterative decoding of LDPC in moderate and high SNR region which would increase the BER.A modified decoding algorithm is proposed to combat the negative effect on the decoding performance.The modified decoding algorithm achieves an improved performance of 0.2 dB in comparison to the traditional BP decoding algorithm when Eb/N0 is between 0 dB and 1.5 dB. |
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| Keywords: | LDPC decoding algorithm feedback |
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