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https://open.uns.ac.rs/handle/123456789/2063
Title: | Optimizing FDTD memory bandwidth by using block float-point arithmetic | Authors: | Pijetlović, Stefan Subotić, Miloš Pjevalica, Nebojša |
Issue Date: | 1-Jan-2018 | Journal: | Elektronika ir Elektrotechnika | Abstract: | © 2018 Kauno Technologijos Universitetas. All rights reserved. Finite-difference time-domain is a numerical method used for modelling of computational electrodynamics. The method is resource intensive, especially regarding memory usage. Multiple memory accesses are required per single computation so memory bandwidth acts as a bottleneck limiting the overall performance. Existing solutions use either fixed-point or floating-point arithmetic, depending on the complexity of the target platform, to model the data. Floating-point requires less memory access but the computation is more intensive due to the normalisation. Fixed-point is the opposite - simple computation but with more memory access for the same precision. The novelty of this paper is in the block floating-point realization which is the middle ground between the two. The approach is less compute intensive than the floating-point solutions while using less memory than the fixed-point realization. This makes the solution an alternative for bit-exact platforms, such as field-programmable gate arrays. The results are compared to both floating-point and fixed-point implementations and the memory bandwidth and other resources needed for targeted platform are calculated. | URI: | https://open.uns.ac.rs/handle/123456789/2063 | ISSN: | 13921215 | DOI: | 10.5755/j01.eie.24.4.21475 |
Appears in Collections: | FTN Publikacije/Publications |
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