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| Presentation | 2020-07-16 11:10 [Invited Lecture] Accelerating ray tracing using nonuniform ray launching directions Takahiro Hashimoto, Michio Takikawa (Mitsubishi electric)  AP2020-15 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | radio propagation / ray-tracing / geometrical optics approximation / monte carlo sampling / bounding volume hierarchy / BVH / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 97, AP2020-15, pp. 33-38, July 2020. | |
| Paper # | AP2020-15 | |
| Date of Issue | 2020-07-08 (AP) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | AP2020-15 |
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| Conference Information | |
| Committee | AP SANE SAT |
| Conference Date | 2020-07-15 - 2020-07-17 |
| 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 |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2020-07-AP-SANE-SAT |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | 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 |
| Keyword(7) | |
| Keyword(8) | |
| 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) |
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| Speaker | Author-1 |
| Date Time | 2020-07-16 11:10:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2020-15 |
| Volume (vol) | vol.120 |
| Number (no) | no.97 |
| Page | pp.33-38 |
| #Pages | 6 |
| Date of Issue | 2020-07-08 (AP) |
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