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Evaluation of vector sensors for adaptive equalization in underwater acoustic communication

机译:水声通信中自适应均衡矢量传感器的评估

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摘要

Underwater acoustic communication is an extremely complex field that faces many challenges due to the time-varying nature of the ocean environment. Vector sensors are a proven technology that when utilizing their directional sensing capabilities allows us to minimize the effect of interfering noise sources. A traditional pressure sensor array has been the standard for years but suffers at degraded signal to noise ratios (SNR) and requires maneuvers or a lengthly array aperture to direction find. This thesis explores the effect of utilizing a vector sensor array to steer to the direction of signal arrival and the effect it has on equalization of the signal at degraded SNRs. It was demonstrated that utilizing a single vector sensor we were able steer to the direction of arrival and improve the ability of an equalizer to determine the transmitted signal. This improvement was most prominent when the SNR was degraded to levels of 0 and 10 dB where the performance of the vector sensor outperformed that of the pressure sensor in nearly 100% of cases. Finally, this performance improvement occurred with a savings in computational expense.
机译:水下声通信是一个极其复杂的领域,由于海洋环境的时变特性,因此面临许多挑战。矢量传感器是一项经过验证的技术,当利用其方向感测功能时,我们可以将干扰噪声源的影响降至最低。传统的压力传感器阵列多年来一直是标准,但受信噪比(SNR)下降的困扰,需要操纵或需要较长的阵列孔径才能找到方向。本文探讨了利用矢量传感器阵列来控制信号到达方向的效果,以及在降低SNR时对信号均衡的影响。事实证明,利用单个矢量传感器,我们能够转向到达方向,并提高了均衡器确定发射信号的能力。当SNR降低到0和10 dB的水平时,这种改进最为显着,其中矢量传感器的性能在几乎100%的情况下都优于压力传感器。最终,这种性能的提高与节省的计算费用有关。

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