ササキ　リョウヘイ   佐々木　亮平    所属   コンピュータサイエンス学部 コンピュータサイエンス学科    職種   助教
言語種別	英語
発行・発表の年月	2021/03
形態種別	学術論文
査読	査読あり
標題	Ray Tracing Acceleration using Total Variation Norm Minimization for Radio Map Simulation
執筆形態	共著
掲載誌名	IEEE Wireless Communications Letters
掲載区分	国外
出版社・発行元	IEEE
巻・号・頁	10(3),pp.522-526
著者・共著者	N. Suga, R. Sasaki, M. Osawa, and T. Furukawa
概要	In this letter, a ray tracing (RT) acceleration method based on the total variation norm minimization (TVNM) scheme is presented. RT is a general tool used to analyze wireless communication environments. However, the simulation is time consuming because of the large number of ray calculations. This letter focuses on radio map interpolation as an acceleration approach. For radio map interpolation, we adopt TVNM, which is a representative edge-preserving interpolation method in the field of image processing. We regard the non-line-of-sight and line-of-sight region boundary as the edge of the radio map and use TVNM to achieve accurate interpolation. Furthermore, we consider known position selection to enhance the interpolation accuracy of TVNM. A computational simulation using commercial RT software revealed that the interpolation accuracy of the proposed method was better than those of other radio map interpolation methods and that RT simulation can be accelerated with an acceptable interpolation error.