Underwater Acoustic Communication by a Single-Vector Sensor: Performance Comparison Using Three Different Algorithms
Underwater Acoustic Communication by a Single-Vector Sensor: Performance Comparison Using Three Different Algorithms
复制标题
单矢量传感器的水声通信：使用三种不同算法的性能比较
DOI：
10.1155/2018/2510378
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发表时间：
2018-01-01
影响因子：
1.6
通讯作者：
Yu, Xue-song
中科院分区：
文献类型：
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作者：
Guo, Long-xiang;Han, Xiao;Yu, Xue-song
2014年11月，在浅海环境下进行了单矢量传感器水声通信实验。在本文中，三种不同的算法被用来处理实验数据，并比较他们的性能均衡输出信噪比（OSNR）和误码率（BER）。这三种算法分别是P-DFE、B-DFE和T-DFE。P-DFE仅利用矢量传感器的压力通道实现判决反馈均衡器（DFE）。B-DFE首先对压力通道和速度通道进行线性组合，然后利用DFE对组合后的信号进行均衡。T-DFE采用时间反转将矢量传感器的所有通道进行联合收割机合并，然后再进行单通道DFE，以消除残留的码间干扰。数据处理结果表明，B-DFE和T-DFE都能取得比P-DFE更好的性能。研究还发现，B-DFE的性能取决于合成信号的波束方向图，而T-DFE的性能取决于合成信号的q函数。应该使用哪种算法来处理真实的数据，B-DFE还是T-DFE，取决于矢量传感器的不同通道之间的相干程度。
In November, 2014, the underwater acoustic (UWA) communication experiment by a single-vector sensor was conducted in shallow water environment. In this paper, three different algorithms are used to process the experimental data and their performance are compared in terms of equalized output signal to noise ratio (OSNR) and bit error rate (BER). The three algorithms are P-DFE, B-DFE, and T-DFE, respectively. P-DFE uses only the pressure channel of the vector sensor to realize the decision feedback equalizer (DFE). B-DFE linearly combines the pressure channel and velocity channel first and then uses DFE to equalize the combined signal. T-DFE adopts time reversal to combine all the channels of the vector sensor and then is followed by a single-channel DFE to remove residual intersymbol interference (ISI). According to the data processing results, both B-DFE and T-DFE can achieve better performance compared with P-DFE. This paper also finds that the performance of B-DFE depends on the beam pattern of the combined signal while the performance of T-DFE depends on the q function of the combined signal. Which algorithm should be used to process real data, B-DFE or T-DFE, depends on the degree of coherence between different channels of the vector sensor.