| 数字调幅广播中基于LDPC码的多级编码方案 |
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| 引用本文： | 王加庆,于晓燕,吴乐南. 数字调幅广播中基于LDPC码的多级编码方案[J]. 通信学报, 2006, 27(1): 85-90 |
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| 作者姓名： | 王加庆 于晓燕 吴乐南 |
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| 作者单位： | 东南大学,无线电工程系,江苏,南京,210096 |
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| 摘 要： | 研究了DAMB系统中基于LDPC码的多级编码方案。首先,设计了MLC分量码的码率,从而给出一种具有自适应特性的以LDPC码为分量码的多级编码方案。提出了基于可靠信息传播的多级译码方案,该方案不会造成信息丢失,且不需要重编码。构造了一组性能优异的非正则LDPC码并在DAMB信道进行了差错率仿真,结果表明基于LDPC码的MLC方案全面优于标准中RCPC/MLC方案。
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| 关 键 词： | 纠错编码 LDPC码 多级编码 正交频分复用 数字调幅广播 |
| 文章编号： | 1000-436X（2006）01-0085-06 |
| 收稿时间： | 2004-08-11 |
| 修稿时间： | 2005-11-15 |
Multilevel coding scheme based on low-density parity-check codes in DAMB |
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| WANG Jia-qing,YU Xiao-yan,WU Le-nan. Multilevel coding scheme based on low-density parity-check codes in DAMB[J]. Journal on Communications, 2006, 27(1): 85-90 |
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| Authors: | WANG Jia-qing YU Xiao-yan WU Le-nan |
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| Affiliation: | Department of Radio Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | A multilevel coding(MLC)scheme based on LDPC codes was investigated for digital amplitude modulation broadcasting(DAMB)system.Firstly,code rates of MLC were designed,then a multistage decoding strategy was provided based on reliability information instead of only hard decisions to subsequent decoders.We also found a set of excellent irregular LDPC codes and examined the performance of them in DAMB channels.Simulations show that this scheme is more effective than the rate compatible punctured convolutional(RCPC)coded DAMB system. |
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| Keywords: | error-correcting codes LDPC codes MLC OFDM DAMB |
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