Extending the frequency range of the Walfisch‐Bertoni (W‐B) model, which is a representative theory‐based model, was investigated. To extend the W‐B model, three changes to the original W‐B model were made: (i) remodeling over rooftop path, (ii) introducing a slant path, and (iii) modeling of multiple reflections between buildings. To validate the proposed model, propagation loss predicted by the model was compared with measurement results. Comparison with the measurement results shows that root mean square errors of propagation loss predicted by the proposed model are 5.8 dB for radiowave frequency of 2.2 GHz, 6.6 dB for 5.2 GHz, and 3.3 dB for 26.4 GHz. It is therefore concluded that the proposed model has can achieve high estimation accuracy for all measured frequency bands.

中文翻译：

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扩展的Walfisch-Bertoni传播模型可覆盖短距离和毫米波频段

研究了扩展基于理论的代表性模型Walfisch-Bertoni（W-B）模型的频率范围。为了扩展W-B模型，对原始W-B模型进行了三处更改：（i）在屋顶路径上进行建模，（ii）引入倾斜路径，以及（iii）对建筑物之间的多次反射进行建模。为了验证所提出的模型，将模型预测的传播损耗与测量结果进行了比较。与测量结果的比较表明，所提出的模型预测的传播损耗的均方根误差在2.2 GHz的无线电波频率下为5.8 dB，在5.2 GHz的情况下为6.6 dB，在26.4 GHz的情况下为3.3 dB。因此，可以得出结论，所提出的模型对于所有测得的频带都可以实现较高的估计精度。