船舶舱室环境中无线信道全波建模与分析方法  

Study on the Simulation Method for Modeling and Analyzing of Wireless Channel in Ship Cabin Environment

作　　者：张燕军 王健[1] 时稳 ZHANG Yan-jun;WANG Jian;SHI Wen(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《无线通信技术》2022年第2期7-12,共6页Wireless Communication Technology

基　　金：宁波市自然科学基金(202003N4153);浙江省省属高校基本科研业务费专项资金资助(LY22F010002)。

摘　　要：为保证船舶舱室的通信质量,研究无线电波的传播特性显得尤为重要。本文将金属共形技术引入时域有限差分法,用于曲形舱室结构的电磁传播特性和信道建模分析。具体地,通过修正共形网格处磁场迭代方程的系数,减少FDTD方法在计算曲形物体时存在的阶梯近似误差。通过与CST软件场仿真结果对比,验证了该方法的正确性。接着,将该方法用于模拟大型船舶舱室环境中的超短波无线信道,并通过CLEAN算法对时域信号进行数据后处理,得到了舱室下多径分量的功率分布及簇的数目。仿真结果表明,该方法不用增大网格的剖分精度,仍可获得较高的计算精度,适用于不规则大型物体目标的电磁求解。In order to ensure the communication quality of the ship’s cabin, it is particularly important to analyze the propagation characteristics of wireless electric waves in the cabin. In this paper, conformal technology is introduced into the finite-difference time-domain method for the analysis of electromagnetic propagation characteristics and channel modelling of curved cabin structures. Specifically, by modifying the coefficients of the magnetic field iteration equation at the conformal grid, staircase approximation error is reduced in the calculation of curved objects with the FDTD method. The correctness of this method is verified by comparing field simulation results with the CST software. Then, this method is used to simulate the ultrashort wave wireless channel in a large ship cabin environment, and the power distribution of the multipath components and the number of clusters in the cabin are obtained by data post-processing of the time-domain signal with the CLEAN algorithm. The simulation results show that this method can obtain higher calculation accuracy without the use of fine meshes, and is suitable for the electromagnetic solution of irregular large object targets.

关 键 词：时域有限差分法(FDTD) 共形技术 无线信道 CLEAN算法 

分 类 号：TN92[电子电信—通信与信息系统]