| 陈友淦,许肖梅,冯玮,张兰.浅海水声信道中QC-LDPC码性能研究[J].高技术通讯(中文),2011,21(12):1252~1257 |
| 浅海水声信道中QC-LDPC码性能研究 |
| Performance analysis of QC LDPC codes over shallow water acoustic channels |
| 修订日期：2010-04-19 |
| DOI： |
| 中文关键词: 准循环低密度奇偶校验(QC LDPC)码， 准循环， 浅海水声信道， 水声通信 |
| 英文关键词: quasi cyclic low density parity check (QC LDPC) codes, quasi cyclic, shallow water acoustic channel, underwater acoustic communications |
| 基金项目:863计划(2006AA09Z108)， 国家自然科学基金(40776022)，高等学校博士学科点专项科研基金(20090121110001)和中央高校基本科研业务费专项基金(201112G020)资助项目 |
| 作者 | 单位 | | 陈友淦 | 厦门大学信息科学与技术学院厦门；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 | | 许肖梅 | 厦门大学信息科学与技术学院厦门；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 | | 冯玮 | 厦门大学信息科学与技术学院厦门；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 | | 张兰 | 厦门大学信息科学与技术学院厦门；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 |
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| 中文摘要: |
| 针对大起伏、强多途、窄带宽的浅海水声信道需采用码长短、性能好、易于实时处理的信道纠错码技术才能提高水声通信系统可靠性的问题，提出了准循环低密度奇偶校验(QC LDPC)码作为浅海水声信道的信道纠错编码方案。建立了QC LDPC码在水声信道中的仿真模型，采用BP译码算法，在典型3径浅海水声信道中就码率、围长等参数对误码率的影响进行了仿真，比较了其在不同海洋信道条件下的性能，在厦门港浅海域典型水声信道模型下，仿真研究了QC LDPC码的性能。结果表明编码复杂度较低的QC LDPC码，性能接近于复杂度高、随机构 |
| 英文摘要: |
| Considering that a shallow water acoustic (SWA) channel is characterized by rapid time dispersive fading, multipath and narrow bandwidth, which has to use the error correcting code technique with short code length, good performance and easy implementation to improve the reliability of its communication system, the quasi cyclic low density parity check (QC LDPC) coding as an error correction coding scheme was applied to SWA channels. A system simulation model including QC LDPC codes for the SWA channels was built. With the decoding algorithm of belief propagation (BP), the performance of the system was simulated over a typical three multipath SWA channel under different code rates and girths. The performance comparison of QC LDPC codes in different SWA channels was presented. A channel model was established according to the characteristic of the SWA channel environment in Xiamen harbor. The model was used to simulate the performance of QC LDPC codes. The simulation results show that simple QC LDPC codes can achieve almost the same performance of the random (3, 6) LDPC codes, which proves the effectiveness and the good application prospects of QC LDPC codes in SWA communication |
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