| 水声信道下差分跳频信号检测的优化算法 |
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| 引用本文： | 梁国龙,刘友永,张光普.水声信道下差分跳频信号检测的优化算法[J].哈尔滨工程大学学报,2010,31(8). |
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| 作者姓名： | 梁国龙 刘友永 张光普 |
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| 作者单位： | 哈尔滨工程大学水声技术实验室,黑龙江哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金资助项目，哈尔滨工程大学基础研究基金资助项目 |
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| 摘 要： | 为克服水声多途干扰影响,提出将差分跳频技术应用于水声通信,通过分析水声多途信道下差分跳频信号的特征,利用频率转移函数的隐含信息和水声信道的多途特征,优化了频率序列检测的Vitervi硬判决算法,并详细给出了算法流程.在含有加性高斯白噪声的多途信道下进行了仿真.结果表明,采用优化算法的系统性能得到显著提高,在频率检测差错率为10×10-3时,获得了近2.5 dB的增益,表明差分跳频体制能有效克服多途干扰,适用于水声通信.
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| 关 键 词： | 差分跳频 频率转移函数 多途干扰 Viterbi算法 |
A modified detection algorithm for underwater acoustic differential frequency hopping signals |
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| LIANG Guo-long,LIU You-yong,ZHANG Guang-pu.A modified detection algorithm for underwater acoustic differential frequency hopping signals[J].Journal of Harbin Engineering University,2010,31(8). |
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| Authors: | LIANG Guo-long LIU You-yong ZHANG Guang-pu |
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| Affiliation: | LIANG Guo-long,LIU You-yong,ZHANG Guang-pu(Acoustic Science and Technology Laborcutory,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | Differential frequency hopping(DFH) was applied to underwater acoustic communications to overcome multi-path interference.After analyzing the characteristic of DFH signals,which had passed through underwater acoustic channels,a modified Viterbi hard-decision algorithm was proposed.It used the hidden information of the G function(frequency transfer function) and characteristics of the multi-path,and a detailed flow chart was worked out.The simulation results showed that the performance of a DFH system with t... |
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| Keywords: | differential frequency hopping G function multi-path interference Viterbi algorithm |
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