| 浅海水声信道中的一种带循环均衡的Turbo译码结构 |
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| 引用本文： | 刘胜兴,许肖梅.浅海水声信道中的一种带循环均衡的Turbo译码结构[J].高技术通讯,2009,19(5). |
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| 作者姓名： | 刘胜兴 许肖梅 |
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| 作者单位： | 厦门大学海洋与环境学院,厦门,361005;厦门大学水声通信与海洋信息技术教育部重点实验室,厦门,361005 |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863计划) |
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| 摘 要： | 针对浅海水声信道长时延、强多途干扰的特点,建立了一种新的带自适应循环判决反馈均衡的Turbo译码结构,并对其性能进行了仿真研究.该结构对典型的Turbo译码器进行了改进,使之不但能输出信息比特,同时又能输出校验比特,这些比特经硬判决、符号映射及信道交织后反馈回判决反馈均衡器,构成带自适应循环判决反馈均衡的Turbo译码结构.厦门港实测5途浅海水声信道仿真结果显示,该结构具有优良的抗多途性能,信噪比大于4dB时,误比特率小于10-5,比联合判决反馈均衡的Turbo译码结构提高了约2.5dB.
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| 关 键 词： | 浅海水声信道 Turbo码 循环判决反馈均衡器 多途 |
A Turbo decoding structure with iterative equalization for shallow water acoustic channels |
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| Liu Shengxing,Xu Xiaomei.A Turbo decoding structure with iterative equalization for shallow water acoustic channels[J].High Technology Letters,2009,19(5). |
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| Authors: | Liu Shengxing Xu Xiaomei |
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| Affiliation: | Liu Shengxing~(***),Xu Xiaomei~(***)(* College of Oceanography and Environmental Science of Xiamen University,Xiamen 361005)( ** Key Laboratory of Underwater Acoustic Communication and Marine Information Technology (Xiamen University),Ministry of Education,Xiamen 361005) |
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| Abstract: | A new Turbo decoding structure with an iterative decision feedback equalizer (DFE) for shallow water acoustic channels was built based on the consideration of the channels'characteristics of long time-delay and strong multipath, and its performances were simulated.In this new structure,the conventional Turbo decoder is modified to generate both information and parity bits,and these bits are first passed to the hard-decision,the symbol mapping,then channel inter- leaving,and then fed back to the DFE to imple... |
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| Keywords: | shallow water acoustic channel Turbo code iterative decision feedback equalizer multipath |
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