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Ray Tracing Augmented With Monte Carlo Diffuse Scattering for Dense Multipath Components Simulation
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DOI：10.1109/LAWP.2025.3615633.png)
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Abstract
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Accurately modeling dense multipath components is essential for wireless propagation, yet traditional ray tracing (RT) becomes impractical when every diffuse reflection is enumerated. This letter augments conventional RT with a Monte-Carlo diffuse-scattering (MCDS) module that launches a single diffuse ray per interaction according to a prescribed probability-density function and applies Russian-Roulette termination, yielding an unbiased estimate of infinitely recursive diffuse paths while keeping the deterministic RT treatment of specular reflections. The fully RT-embedded formulation accommodates any physically realistic scattering pattern, including directive models. In a synthetic single-room scenario, MCDS preserves delay-spread fidelity with near-constant run-time. Institute hallway measurements from the DICHASUS dataset further confirm that MCDS reproduces the diffuse tail more accurately than a hybrid propagation-graph approach, validating both its efficiency and predictive accuracy for high-frequency indoor propagation.
Keywords:
Dense multipath components (DMCs)
diffuse scattering
diffuse tail
Monte Carlo
power delay profile (PDP)
ray tracing (RT)
Journal
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4.8
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2.8W