| 虚拟时间反转镜啁啾率键控的水声多用户通信 |
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| 引用本文： | 袁飞,林晓阳,程恩.虚拟时间反转镜啁啾率键控的水声多用户通信[J].声学学报,2015,40(4):529-536. |
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| 作者姓名： | 袁飞 林晓阳 程恩 |
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| 作者单位： | 1 厦门大学 信息科学与技术学院通信工程系 厦门 361005; |
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| 基金项目： | 国家自然科学基金(61001142,61471308)和中央高校基础研究基金(2013121023)资助 |
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| 摘 要： | 针对频率选择性衰落严重的浅海信道多用户通信问题,提出了一种虚拟时间反转镜(VTRM,Virtual Time Reversal Mirror)啁啾率键控(CRK,Chirp-Rate Keying)的水声多用户通信方式。该算法采用啁啾信号作为载波,接收端利用啁啾信号中心频率与分数阶傅里叶变换域的关系还原出原始信息,并使用虚拟时间反转镜技术减少了多径环境对系统的影响,采用啁啾调频率分集作为多址接入方式。在10 kHz的带宽内,可支持4个用户进行可靠通信,每用户通信速率425 bps。水池及海洋实验结果表明:该算法能够有效地传输数据,并且误码率在10-3数量级以下。
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| 收稿时间： | 2013-12-26 |
Virtual time reversal mirror chirp rate keying for multi-users underwater acoustic communication |
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| Institution: | 1 Department of Communications Engineering, School of Information Science and Technology, Xiamen University Xiamen 361005;2 Key Laboratory of Underwater Acoustic Communication and Marine Information Technology Ministry of Education (Xiamen University) Xiamen 361005 |
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| Abstract: | To solve the problem of multi-user communication in severe frequency-selective fading channel, a multi-user communication algorithm based on VTRM (Virtual Time Reverse Mirror) Chirp-rate keying is proposed. The proposed algorithm selects up-chirp and down-chirp signal as the carriers. And receiver uses the relationship between fractional Fourier transform domain and central frequency of Chirp signal to demodulate the received signals. The VTRM technology can reduce the multipath effect on the system. And diversity of Chirp-rate is used as the multiple access to distinguish different users. The proposed scheme can support four users to communication with the 10 kHz bandwidth, 425 bps data rate per user of the proposed communication scheme is realized. Water pool and sea experiment verified that the data could be transmitted effectively using the proposed scheme and bit error rate was 10-3 order of magnitude. |
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