论文部分内容阅读
为研究浅海海域海底地形对短距离水声信道的影响,选择典型海域测试点,构建平坦、由浅到深、由深到浅、上下起伏四种理想化地形,并根据测试点的声速、海底沉积物等实际数据和短距离水声通信的常用参数进行建模。采用BELLHOP算法对不同季节、不同发射深度情况下四种典型地形的声场传播过程进行仿真,给出各种情况的声场传播图,并比较、分析各种情况下传输损失和多径时延数据。结果表明:①对于浅海短距离水声信道,不同海底地形只有在春夏两季才会对传输损失造成明显影响;②不同海底地形在四个季节都对多径时延造成明显影响;③不同收发深度情况下,海底地形造成的影响有所不同。
In order to study the influence of the seafloor topography on short-range underwater acoustic channels in shallow sea, four typical ideal terrains with flat, shallow to deep, undulating, up-down, up and down are selected based on the test points of typical sea areas, Material and other common parameters of short-range underwater acoustic communication modeling. The BELLHOP algorithm was used to simulate the sound field propagation of four typical terrains under different seasons and different launching depths. The sound field propagation maps were given and the transmission loss and multipath delay data were analyzed and compared under various conditions. The results show that: (1) For shallow-water short-range underwater acoustic channels, different seafloor topography can affect transmission losses only in spring and summer; (2) different seafloor topography affects the multipath delay significantly in all four seasons; (3) Sending and receiving depth cases, the impact of the sea bottom terrain is different.