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In this article, we propose a new hybrid modeling method for indoor-to-outdoor radio coverage prediction. The proposed method is a combination of a ray-optical channel modeling approach and the frequency domain ParFlow method. While the former is widely used for modeling outdoor propagation environments, the latter is computationally efficient and accurate for modeling indoor environments.
MR-FDPF method (multi resolution frequency domain ParFlow) was initially developed to simulate radio propagation in indoor environments. This approach started from a formalism similar to the famous TLM approach in the frequency domain. Since the problem reduces to a linear system resolution, a multi-resolution approach has been developed to solve the system with a lower complexity than standard time-domain...
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