Enabling Underwater Acoustic Cooperative MIMO Systems by Metamaterial-Enhanced Magnetic Induction
Enabling Underwater Acoustic Cooperative MIMO Systems by Metamaterial-Enhanced Magnetic Induction
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DOI：
10.1109/wcnc.2019.8885489
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
Soham Desai;Vaishnendr D. Sudev;Xin Tan;Pu Wang;Zhi Sun
中科院分区：
文献类型：
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作者：
Soham Desai;Vaishnendr D. Sudev;Xin Tan;Pu Wang;Zhi Sun
安装在水下机器人群(URSS)上的水声协作多输入多输出(MIMO)系统可以实现远距离、高吞吐量的通信。然而，由于水声信道的大时延，水声通信不能为协作MIMO的分布式发射机提供实时、准确的同步。此外，水声信道的窄带宽进一步增大了同步时间和误差。在本文中，我们提出了超材料磁感应(M2I)辅助的声学协作MIMO来应对上述挑战。由于M2I具有可以忽略的信号传播延迟，因此可以减少同步时间。为了定量分析系统性能的改善，我们推导了同步误差、信噪比、有效通信时间和系统吞吐量。最后，通过数值仿真验证了M2I辅助同步的改进效果。
The acoustic cooperative multi-input-multi-output (MIMO) systems equipped on the underwater robot swarms (URSs) can enable long-range and high-throughput communications. However, the acoustic communications cannot provide the real-time and accurate synchronization for the distributed transmitters of the cooperative MIMO due to the large delay of acoustic channels. In addition, the narrow bandwidth of the acoustic channel further enlarges the synchronization time and errors. In this paper, we propose the metamaterial magnetic induction (M2I)-assisted acoustic cooperative MIMO to address aforementioned challenges. The synchronization time can be reduced since the M2I has negligible signal propagation delays. To quantitatively analyze the improvement, we deduce the synchronization errors, signal-to-noise ratio (SNR), effective communication time, and the throughput of the system. Finally, the improvement of using M2I-assisted synchronization is validated by the numerical evaluation.