| Presentation | 2020-07-16 [Invited Lecture] Accelerating ray tracing using nonuniform ray launching directions Takahiro Hashimoto, Michio Takikawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Ray-tracing has been successfully used as a site specific radio propagation model adopted to wide range applications such as generating channel model and design of base station placement, which considered as must-to-have technology for advanced wireless systems. Meanwhile, the calculation cost is significant in the scene which consist many reflection/diffraction points owing to enormous search space, therefore approximate algorithms to get effective propagation paths are important. We propose a non-uniform sampling method according to the probability distribution to generate initial set of rays, and an algorithm for bounding volume hierarchy (BVH) which is applicable to intersection check between ray tube and edges/observers. The former method increases the probability for the direction which contribute received powers, resulting in the reduction of calculation time to 70% - 80%. The latter method reduces calculation time to 4.5% comparing with the time which uses face BVH only. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | radio propagation / ray-tracing / geometrical optics approximation / monte carlo sampling / bounding volume hierarchy / BVH |
| Paper # | AP2020-15 |
| Date of Issue | 2020-07-08 (AP) |
| Conference Information | |
| Committee | AP / SANE / SAT |
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| Conference Date | 2020/7/15(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Subsurface Electromagnetic Measurements, Sattelite Communication, Radio propagation, Antennas and Propagation |
| Chair | Qiang Chen(Tohoku Univ.) / Akitsugu Nadai(NICT) / Hisashi Sujikai(NHK) |
| Vice Chair | Satoru Kurokawa(AIST) / Hiroyoshi Yamada(Niigata Univ.) / Makoto Tanaka(Tokai Univ.) / Hiroyasu Ishikawa(Nihon Univ.) / Tetsushi Ikegami(Meiji Univ.) |
| Secretary | Satoru Kurokawa(Tokyo Univ. of Agric. & Tech.) / Hiroyoshi Yamada(NTT DOCOMO) / Makoto Tanaka(Mitsubishi Electric) / Hiroyasu Ishikawa(Univ. of Tokyo) / Tetsushi Ikegami(NHK) |
| Assistant | Dr. Kim(Niigata Univ.) / Shunichi Futatsumori(ENRI) / Takuya Okura(NICT) / Daisuke Goto(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Antennas and Propagation / Technical Committee on Space, Aeronautical and Navigational Electronics / Technical Committee on Satellite Telecommunications |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Invited Lecture] Accelerating ray tracing using nonuniform ray launching directions |
| Sub Title (in English) | |
| Keyword(1) | radio propagation |
| Keyword(2) | ray-tracing |
| Keyword(3) | geometrical optics approximation |
| Keyword(4) | monte carlo sampling |
| Keyword(5) | bounding volume hierarchy |
| Keyword(6) | BVH |
| 1st Author's Name | Takahiro Hashimoto |
| 1st Author's Affiliation | Mitsubishi electric corporation(Mitsubishi electric) |
| 2nd Author's Name | Michio Takikawa |
| 2nd Author's Affiliation | Mitsubishi electric corporation(Mitsubishi electric) |
| Date | 2020-07-16 |
| Paper # | AP2020-15 |
| Volume (vol) | vol.120 |
| Number (no) | AP-97 |
| Page | pp.pp.33-38(AP), |
| #Pages | 6 |
| Date of Issue | 2020-07-08 (AP) |