A Novel MoM- and SSPE-based Groundwave-Propagation Field-Strength Prediction Simulator
A Novel MoM- and SSPE-based Groundwave-Propagation Field-Strength Prediction Simulator
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DOI：
10.1109/map.2007.4395296
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发表时间：
2007-12
影响因子：
3.5
通讯作者：
F. Akleman;L. Sevgi
中科院分区：
文献类型：
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作者：
F. Akleman;L. Sevgi
在无线系统中，了解当地的地波传播特性是必不可少的。虽然麦克斯韦方程建立了理论背景，但只有少数高度理想化的地波传播问题有数学上的精确解和/或近似解。因此，半解析/数值和纯数值模拟方法几乎是处理实际地波传播问题的唯一方法。在一定程度上，数值模拟器应该能够考虑非平坦、可穿透的地形和不均匀的大气影响。遗憾的是，还没有出现一个普遍适用的模拟器；已经有许多方法在不同的假设和近似下开发，在不同的参数范围内有效。因此，将这些方法应用于相同的物理问题、进行比较和评估数值结果是一个挑战。考虑到这些因素，本文介绍了一个新的基于MatLab的程序包GrMoMPE。首先对其进行了验证和标定，然后将其应用于一些特征地波传播问题。GrMoMPE的引入使得进行直接和准确的对比和可靠的物理解释成为可能。
Knowledge of the local groundwave-propagation characteristics is essential in wireless systems. Although Maxwell's equations establish the theoretical background, only a limited number of highly idealized groundwave-propagation problems have mathematically exact and/or approximate solutions. Therefore, semi-analytical/numerical and pure numerical simulation methods are almost the only way to handle realistic groundwave-propagation problems. To a certain extent, numerical simulators should be capable of taking non-flat, penetrable terrain and inhomogeneous atmospheric effects into account. Unfortunately, a generally applicable simulator has not yet appeared; there are many methods that have been developed under different assumptions and approximations, valid in different parameter regimes. It is therefore a challenge to apply these methods to the same physical problems, to do comparisons, and to evaluate numerical results. With all these factors in mind, a new MATLAB-based package GrMoMPE is introduced. It is first validated and calibrated, and then applied to some characteristic groundwave-propagation problems. The introduction of GrMoMPE has made it possible to do direct and accurate comparisons and reliable physical interpretations.