Abstract
This paper presents a three-dimensional radio propagation simulation technique that reduces its computation time. The technique is based on the imaging method, which is one of the ray tracing methods. First, the probability that propagation paths exist at evaluation points within second-order reflection is shown. The result shows that the probability is less than a few percents. Therefore, it appears that the computation time can be reduced by eliminating the calculation for evaluation points where rays never launch. Second, the algorithm implemented the idea is presented. The algorithm uses “approximated illumination area. “There aren’t any evaluation points outside the area. The area is solved from the coordinate relationships between the last reflected object and the last imaging point. The last imaging point is derived from recursive image generation of the transmitting point. After that, only evaluation points within the illuminated area are calculated. The computation time can be reduced to less than one-quarter of the time previously required because the calculation for evaluation points where rays don’t launch never be executed. The accuracy of the proposed method is not degraded since the method just eliminates redundancy of the path determination part of the conventional imaging method.
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References
John W. McKnown and R. Lee Hamilton, Jr: “A Ray Tracing as a Design Tool for Radio Networks”, IEEE Network Magazine, pp. 27–30 (November 1991).
Scott Y. Seidel and Theodore S. Rappaport: “A Ray Tracing Technique to Predict Path Loss and Delay Spread Inside Buildings”, IEEE Globecom 92, pp. 649–653 (December 1992).
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© 1996 Kluwer Academic Publishers
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Takahashi, S., Ishida, K., Yoshiura, H., Nakagoshi, A. (1996). An Evaluation Point Culling Algorithm for Radio Propagation Simulation based on the Imaging Method. In: Rappaport, T.S., Woerner, B.D., Reed, J.H. (eds) Wireless Personal Communications. The Kluwer International Series in Engineering and Computer Science, vol 349. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1331-1_12
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DOI: https://doi.org/10.1007/978-1-4613-1331-1_12
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4612-8572-4
Online ISBN: 978-1-4613-1331-1
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