| LDPC码在浅海水声通信中的应用研究 |
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| 引用本文： | 陈友淦,许肖梅. LDPC码在浅海水声通信中的应用研究[J]. 通信技术, 2009, 42(4): 41-42 |
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| 作者姓名： | 陈友淦 许肖梅 |
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| 作者单位： | 厦门大学,水声通信与海洋信息技术教育部重点实验室,福建,厦门,361005;厦门大学,信息科学与技术学院,福建,厦门,361005 |
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| 基金项目： | 国家自然科学基金，福建省科委重点项目 |
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| 摘 要： | LDPC码具有编码增益高、译码速度快、可并行译码等特点，是当前编码界的一个研究热点。针对复杂多变、强多途和大起伏干扰的浅海水声信道，建立了LDPC码在浅海水声信道中仿真的模型，仿真研究了浅海水声信道下采用和一积译码算法的LDPC码性能。仿真结果表明，LDPC码在3径多途信道下性能优越；当译码迭代3—5次，码长1000bit左右时基本上能满足水声通信对误码率为10^-4的基本要求。
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| 关 键 词： | 水声信道 LDPC码 多途 和一积算法 |
Application of LDPC Code in Shallow Water Acoustic Communication |
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| CHEN You-gan,XU Xiao-mei. Application of LDPC Code in Shallow Water Acoustic Communication[J]. Communications Technology, 2009, 42(4): 41-42 |
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| Authors: | CHEN You-gan XU Xiao-mei |
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| Affiliation: | CHEN Vou-gan, XU Xiao-mei((1)Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen Fujian 361005 China; (2)School of Information Science and Technology, Xiamen University, Xiamen Fujian 361005, China) |
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| Abstract: | In this paper, a channel model including time-varying fading, multipath and additive noise for the shallow water acoustic channels is proposed. Based on the channel model, the performances of the LDPC code with sum-product algorithm over shallow water acoustic channel is simulated. The simulation results show that the performance of LDPC code is excellent （Bit error rate less than 10^- 4） over three multipath shallow water acoustic channel, and with 3-5 iterative decoding times and about 1000bit code lengths, is suitable for shallow water acoustic communication. |
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| Keywords: | shallow water acoustic channel LDPC code multipath sum-product algorithm |
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