研究目的
Investigating the implementation of an algorithm to model 3D-ray launching using a fixed-size reception sphere and cylinder to simulate multipath propagation in reduced computational time while retaining accuracy.
研究成果
The proposed method involving a fixed-size reception sphere and cylinder significantly improves computation time while preserving the accuracy of the results. This approach was validated in two indoor environments, demonstrating its feasibility and effectiveness in simulating multipath propagation.
研究不足
The computational performance for the RL is highly dependent on the approach of reception sphere technique. The challenge with the conventional approach of using reception spheres is in determining the appropriate sphere size.
1：Experimental Design and Method Selection:
The study employs a 3D ray launching (RL) technique with a fixed-size reception sphere and cylinder to simulate multipath propagation. Numerical methods are used to ensure accuracy while reducing computational time.
2：Sample Selection and Data Sources:
The method was tested in two indoor office environments previously validated by the authors.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned in the provided text.
4：Experimental Procedures and Operational Workflow:
The approach involves launching rays separated by a nearly constant angle, using a fixed-size reception sphere and cylinder to determine ray hits, and applying a power cutoff threshold to consider only effective paths.
5：Data Analysis Methods:
The lengths of all ray hits were measured, and the ratio of the longest ray to the Euclidian distance from the transmitter to the reception sphere was calculated. Cumulative distribution functions (CDFs) of these ratios were analyzed.
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