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论文:2016,Vol:34,Issue(5):823-828 |
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引用本文： |
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张玲玲, 黄建国, 唐成凯, 张群飞. 同频时反水下协作通信系统中的自信息干扰消除方法[J]. 西北工业大学学报 |
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Zhang Lingling, Huang Jianguo, Tang Chengkai, Zhang Qunfei. Self-Interference Cancellation in Underwater Cooperative Communication based on Time Reverse[J]. Northwestern polytechnical university |
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| 同频时反水下协作通信系统中的自信息干扰消除方法 |
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| 张玲玲1, 黄建国1, 唐成凯2, 张群飞1 |
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1. 西北工业大学 航海学院, 陕西 西安 710072;
2. 西北工业大学 电子信息学院, 陕西 西安 710072 |
| 摘要: |
| 随着海洋资源的利用和开发，人们对高速率水下通信的需求也更加迫切。但水下环境的高频衰减特性和强噪声导致水下信号的传输带宽受限，信号传输速度较慢。同时现有的水下节点间通信通常采用碰撞避免的MAC协议，在一个时隙内只允许一个有效用户发送数据，因而水声信道的利用率较低。针对上述问题，提出了一种同频时反水下协作通信系统的自信息干扰消除算法。在该水下协作通信系统中，节点可同时通过水下基站向对方发送数据，节点之间共用相同的上行频率和下行频率，实现频谱资源复用。该方法中通过在基站处进行主动时反，消除水声信道传输的多径效应，然后利用节点对自身发射信号已知的特点，消除基站转发信息中的自信息干扰。仿真结果表明，文中所提出方法的误码性能与现有的分时协作通信方法相当，在信噪比为11 dB时，误码率均可以达到10-3，但该方法的传输速度为分时水下协作通信方法的2倍。 |
| 关键词:
水声通信
水下协作通信
时反通信
频率复用
自干扰消除
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| Self-Interference Cancellation in Underwater Cooperative Communication based on Time Reverse |
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| Zhang Lingling1, Huang Jianguo1, Tang Chengkai2, Zhang Qunfei1 |
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1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China;
2. School of Electronics Engineering, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| Recently, with the development of Marine exploration, the need for high speed underwater communication is growing rapidly. However, information transmission rate is low, because of the limited bandwidth caused by high attenuation for high frequency acoustic signal and great noise in low frequency band. To this end, a self-interference cancellation algorithm in underwater cooperative communication is proposed. In this underwater cooperative communication system, underwater nodes could transmit to each other through underwater base station at the same time. Moreover, common uplink frequency and downlink frequency are adopted to reuse the frequency spectrum and improve the transmission efficiency. In this algorithm, active time reverse is adopted to mitigate the multipath effect in underwater acoustic transmission and then take advantage of the known characteristic of self-information, the self-interference could be cancelled. Simulation results show that, the bit error ratio performance is similar to existing time division cooperative communication, and may double the transmission rate. |
| Key words:
underwater acoustic communication
underwater cooperative communication
time reverse
frequency reuse
self Interference cancellation
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| 收稿日期: 2016-04-02
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金（61271415、61471298、61531015）、水下信息处理与控制国家重点实验室基金（9140C231002130C23085）、西北工业大学博士论文创新基金（CX201230）及西北工业大学基础研究基金——中央高校基本科研业务费专项基金（3102014JCQ01010）资助 |
| 通讯作者:
Email： |
| 作者简介: 张玲玲(1986-),女,西北工业大学博士研究生,主要从事水声通信、信道均衡研究。
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参考文献: |
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