全海深高速水声通信机设计与试验

In order to adapt to the rapid development in the field of deep-sea scientific exploration and achieve the coverage of underwater acoustic communication capabilities in the entire sea area, this paper designs an all-sea deep-water underwater acoustic communicator. This underwater acoustic communicator uses a high-power Class D power amplifier for signal transmission and utilizes a three-element receiving channel for spatial diversity reception, with a maximum communication distance of 12 km. The underwater acoustic communicator adopts single-carrier coherent underwater acoustic communication technology. The coherent demodulation algorithm uses a time-frequency domain bidirectional turbo equalizer structure, and the adjustment of the equalizer coefficients uses an improved proportionate normalized minimum symbol error rate criterion algorithm. This communicator conducted a real-time underwater acoustic communication test in the Challenger Deep of the Mariana Trench, the deepest part of the ocean, on December 12, 2018, achieving high-speed underwater acoustic communication from 10,500 m underwater to the water surface, with a communication rate of 6000 bps and a communication bit error rate on the order of 10^(-5).

为了适应深海科学考察领域的快速发展,实现对全海域水声通信能力的覆盖,本文设计了一种全海深水声通信机。该水声通信机采用大功率D类功率放大器进行信号发射,利用三基元接收通道进行空间分集接收,最大通信距离12 km。水声通信机采用单载波相干水声通信技术,相干解调算法采用了时频域双向turbo均衡器结构,均衡器系数调整采用了改进比例归一化最小误符号率准则算法。该通信机于2018年12月12日在海洋最深处马里亚纳海沟挑战者深渊进行了实时水声通信试验,实现了水下10500 m到水面的高速水声通信,通信速率6000 bps,通信误比特率为10~(-5)量级。