| 一种改善Turbo乘积编码OFDM系统性能的新方法 |
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| 引用本文： | 刘伟,张海林,刘增基.一种改善Turbo乘积编码OFDM系统性能的新方法[J].电路与系统学报,2004,9(2):14-17,68. |
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| 作者姓名： | 刘伟 张海林 刘增基 |
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| 作者单位： | 西安电子科技大学,ISN重点实验室,陕西,西安,710071 |
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| 基金项目： | 国家自然科学基金重大研究计划项目(90104019)，武器装备预研基金(51421040101DZ0157) |
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| 摘 要： | 本文提出一种利用对译码器软信息限幅来改善多径衰落信道中Turbo乘积编码OFDM(TPC-OFDM)系统性能的新方法。通过对不同多径衰落信道中QPSK映射和16QAM映射的TPC-OFDM系统性能的数值仿真，结果表明在10^-5误比特率下，这种新方法比传统的迭代译码大约有6～10dB的改进，对严重多径环境下TPC-OFDM系统的错误平底也有明显的改进。
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| 关 键 词： | 多径衰落信道 正交频分复用 Turbo乘积码 限幅器 迭代译码 |
| 文章编号： | 1007-0249(2004)02-0014-05 |
A Novel Method for Improving Performance of Turbo Product Coded OFDM |
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| LIU Wei,ZHANG Hai-lin,LIU Zeng-ji.A Novel Method for Improving Performance of Turbo Product Coded OFDM[J].Journal of Circuits and Systems,2004,9(2):14-17,68. |
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| Authors: | LIU Wei ZHANG Hai-lin LIU Zeng-ji |
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| Abstract: | A novel method by clipping the input soft information of decoder to improve the performance of turbo product coded OFDM (TPC-OFDM) system in multipath fading channels is proposed. Numerical simulation on TPC-OFDM mapped QPSK and 16QAM signals in different multipath fading channels show that using the proposed method, the performance of TPC-OFDM can be improved from 6dB to 10dB at error bit rate of 10-5 over the conventional iterative decoding. The error floor of TPC-OFDM in severe multipath fading channels can also be reduced efficiently. |
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| Keywords: | multipath fading channels OFDM turbo product codes clipper iterative decoding |
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