Research On Characteristics Of Maritime Wireless Channel Base On FDTD

The characteristics of marine wireless communication channel is very complex. The wireless channel model of sea surface is mainly affected by the randomness of sea waves, which is reflected in Energy attenuation, Doppler frequency shift etc. Having a good knowledge of the marine channel is a need for building stable marine communication system.In this paper, FDTD algorithm is used to analysis and research the signal propagation characteristics. Firstly, the modeling of two dimensional sea scenario is analyzed by modified PM spectrum model for researching the wireless signal propagation characteristics in different surface height. It can reflect the real scenario and propagation process using the 3D surface model effectively. Meanwhile, the 3D parallel FDTD algorithm is employed in modeling the surface channel. Combined with MPI and OpenMP, the 3D parallel FDTD algorithm improves the accuracy and scope of simulation effectively. After that, it summarizes the model of Path Loss and delay spread based on frequency and wave height in the case of fixed transmitter and receiver location.The innovation point of this article lies in applying FDTD algorithm to the research of marine wireless communication channel, combined with CPML boundary condition, which improves the boundary absorption efficiency and simulation accuracy. In addition, this paper also completes the 3D parallel FDTD algorithm based on MPI and OpenMP, and then the method is used to research the surface characteristics of marine wireless signal propagation. The parallel algorithm is carried out on the super computer of Tianjin University, which not only improves the data simulation accuracy, but also makes the FDTD algorithm adapted in large regions of the electromagnetic simulation environment effectively.