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Deterministic Approach for Fast Simulations of Indoor Radio Wave Propagation

Jean-Marie Gorce 1 Katia Jaffrès-Runser 1 Guillaume de la Roche 1
1 ARES - Architectures of networks of services
Inria Grenoble - Rhône-Alpes, CITI - CITI Centre of Innovation in Telecommunications and Integration of services
Abstract : The multiresolution frequency domain parflow (MR-FDPF) approach is applied to radio wave propagation in indoor environments. This method allows for a better understanding of indoor propagation and hence greatly assists the development of WiFi-like network planning tools. The efficiency of such wireless design tools is strongly impacted by the quality of the coverage predictions which have to be estimated with a limited computational load. The usual approaches are based either on an empirical modeling relying on measurement campaigns or on geometrical optics leading to ray-tracing. While the former approach suffers from a lack of accuracy, the later one needs to balance accuracy with computational load requirements. The new approach proposed herein is based on a finite difference formalism, i.e., the transmission line matrix (TLM). Once the problem is developed in the frequency domain, the linear system thus obtained is solved in two steps: a pre-processing step which consists of an adaptive MR (multigrid) pre-conditioning and a propagation step. The first step computes a MR data structure represented as a binary tree. In the second step the coverage of a point source is obtained by up-and-down propagating through the binary tree. This approach provides an exact solution for the linear system whilst significantly reducing the computational complexity when compared with the time domain approach
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Jean-Marie Gorce, Katia Jaffrès-Runser, Guillaume de la Roche. Deterministic Approach for Fast Simulations of Indoor Radio Wave Propagation. IEEE Transactions on Antennas and Propagation, Institute of Electrical and Electronics Engineers, 2007, 55 (3), pp.938-948. ⟨10.1109/TAP.2007.891811⟩. ⟨inria-00404836⟩



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