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Single Carrier with Frequency Domain Equalization for Synthetic Aperture Underwater Acoustic Communications

机译:合成孔径水下声通信的频域均衡单载波

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Phase-coherent underwater acoustic (UWA) communication systems typically employ multiple hydrophones in the receiver to achieve spatial diversity gain. However, small underwater platforms can only carry a single transducer which can not provide spatial diversity gain. In this paper, we propose single-carrier with frequency domain equalization (SC-FDE) for phase-coherent synthetic aperture acoustic communications in which a virtual array is generated by the relative motion between the transmitter and the receiver. This paper presents synthetic aperture acoustic communication results using SC-FDE through data collected during a lake experiment in January 2016. The performance of two receiver algorithms is analyzed and compared, including the frequency domain equalizer (FDE) and the hybrid time frequency domain equalizer (HTFDE). The distances between the transmitter and the receiver in the experiment were about 5 km. The bit error rate (BER) and output signal-to-noise ratio (SNR) performances with different receiver elements and transmission numbers were presented. After combining multiple transmissions, error-free reception using a convolution code with a data rate of 8 kbps was demonstrated.
机译:相干水声(UWA)通信系统通常在接收器中采用多个水听器,以实现空间分集增益。但是,小型水下平台只能携带一个不能提供空间分集增益的传感器。在本文中,我们为相位相干合成孔径声通信提出了一种具有频域均衡的单载波(SC-FDE),其中通过发射器和接收器之间的相对运动生成虚拟阵列。本文通过2016年1月的一次湖泊实验收集的数据展示了使用SC-FDE的合成孔径声通信结果。分析并比较了两种接收器算法的性能,包括频域均衡器(FDE)和混合时频域均衡器( HTFDE)。实验中发射器和接收器之间的距离约为5 km。给出了具有不同接收器元件和传输次数的误码率(BER)和输出信噪比(SNR)性能。组合多次传输后,演示了使用卷积码以8 kbps的数据速率进行的无差错接收。

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