| 频率选择性信道下Turbo码和SC-FDE的联合方案 |
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| 引用本文： | 许定根,程乃平. 频率选择性信道下Turbo码和SC-FDE的联合方案[J]. 国际商务研究, 2010, 50(5) |
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| 作者姓名： | 许定根 程乃平 |
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| 作者单位： | 装备指挥技术学院 研究生管理大队，北京 101416;装备指挥技术学院 光电装备系，北京 101416 |
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| 基金项目： | 国家高技术研究发展计划（863计划）资助项目（2006AA701419） |
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| 摘 要： | 针对频率选择性信道下宽带数据传输存在符号间干扰(ISI)，提出了一种频率选择性信道下联合Turbo码和单载波频域均衡（SC-FDE）的宽带传输方案。通过改进传统SC-FDE结构，设计了一种SC-FDE软信息提取方法，提高了进入Turbo码译码器先验信息的精确性，从而改善了系统整体性能。仿真结果表明，相比较于硬信息输出，采用SC-FDE软信息输出能够改善输出信噪比，提高系统性能。
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| 关 键 词： | 宽带无线通信；单载波频域均衡；Turbo码；多径信道；软信息输出 |
A Joint Scheme of Turbo Codes and SC-FDE in Frequency Selective Fading Channel |
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| XU Ding-gen and CHENG Nai-ping. A Joint Scheme of Turbo Codes and SC-FDE in Frequency Selective Fading Channel[J]. International Business Research, 2010, 50(5) |
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| Authors: | XU Ding-gen and CHENG Nai-ping |
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| Affiliation: | Graduate Management Unit,The Academy of Equipment Command & Technology,Beijing 101416, China;Department of Optical and Electrical Equipment, The Academy of Equipment Command & Technology, Beijing 101416, China |
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| Abstract: | A joint scheme of Turbo codes and SC-FDE (Single Carrier Frequency Domain Equalization) is proposed to avoid inter symbol interference(ISI) of wideband data transmission in frequency selective fading in this paper. The veracity of SC-FDE output symbol information into the SISO decoder of turbo codes is increased through improving the structure of SC-FDE and designing the method for the symbol soft information calculation. The simulation results show that the joint scheme of Turbo codes and SC-FDE with soft output gains the advantage over the one with hard output and improves the transmission system. |
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