| 时变强多途干扰下基于差分编码的水声OFDM通信算法 |
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| 引用本文： | 邢延超,丁寒雪,Lu Jin,李泽群,何司宇. 时变强多途干扰下基于差分编码的水声OFDM通信算法[J]. 舰船科学技术, 2021, 0(4): 159-162 |
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| 作者姓名： | 邢延超 丁寒雪 Lu Jin 李泽群 何司宇 |
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| 作者单位： | 青岛理工大学信息与控制工程学院;Laboratory of Wireless Communication;School of Electrical and Electronic Engineering |
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| 基金项目： | 国家自然科学基金资助项目(61771271);山东省高等学校科学技术计划项目(J18KA315);青岛市应用基础研究计划项目青年专项(19-6-2-4-cg)。 |
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| 摘 要： | 时变强多途干扰影响水声通信系统性能,针对时变强多途干扰问题,提出基于差分编码的水声OFDM通信(Underwater acoustic OFDM communications based on differential coding,DC-OFDM)算法。利用循环前缀技术和OFDM通信技术固有的抗多途特性,有效消除时变多途干扰,避免信道估计环节,直接进行解码判决。南海实测信道仿真(信噪比为8dB时,DQPSK100组仿真试验,2×106个源码,全部正确解码)和水箱试验(信噪比为15dB时,DQPSK100组水箱试验,2×106个源码,在时变强多途干扰下全部正确解码)。结果表明,所提算法能有效解决时变强多途干扰问题,实现时变强多途水声信道下的可靠水声通信。
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| 关 键 词： | 时变强多途干扰 差分编码 DC-OFDM算法 循环前缀 |
Underwater acoustic OFDM communication algorithm based on differential coding under time-varying strong multi-path interference |
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| XING Yan-chao,DING Han-xue,LU Jin,LI Ze-qun,HE Si-yu. Underwater acoustic OFDM communication algorithm based on differential coding under time-varying strong multi-path interference[J]. Ship Science and Technology, 2021, 0(4): 159-162 |
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| Authors: | XING Yan-chao DING Han-xue LU Jin LI Ze-qun HE Si-yu |
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| Affiliation: | (School of Information and Control Engineering,Qingdao University of Technology,Qingdao 266000,China;Laboratory of Wireless Communication,School of Electrical,Electronic and Computer Engineering,University of Western Australia,Perth Australia;School of Electrical and Electronic Engineering,University of Technology,Sydney Australia) |
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| Abstract: | The performance of underwater acoustic communication system is affected by time-varying strong multipath interference.Aiming at time-varying strong multi-path interference,an underwater acoustic OFDM communications algorithm based on differential coding is proposed.By using the inherent multi-path resistance of cyclic prefix technology and OFDM communication technology,time-varying multi-path interference can be effectively eliminated,channel estimation can be avoided,and decoding decision can be made directly.The results of south China sea channel simulations(the experiment conditions are:SNR is 8 dB,the number of simulation is 100,the number of the source codes is 2×106,all codes were decoded correctly)and water tank experiments(the experiment conditions are:SNR is 15 dB,the number of experiment is 100,the number of the source codes is 2×106,all codes were decoded correctly under the time-varying strong multi-path interference)are provided to demonstrate that the proposed algorithm can effectively solve the problem of time-varying strong multi-path interference,realize reliable underwater acoustic communication under time-varying strong multi-path channel. |
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| Keywords: | time-varying strong multi-path interference differential coding DC-OFDM algorithm cyclic prefix |
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