TY - JOUR
AU - Pijetlovic, Stefan
AU - Subotic, Milos
AU - Pjevalica, Nebojsa
PY - 2018/08/20
Y2 - 2022/09/28
TI - Optimizing FDTD Memory Bandwidth by Using Block Float-Point Arithmetic
JF - Elektronika ir Elektrotechnika
JA - ELEKTRON ELEKTROTECH
VL - 24
IS - 4
SE -
DO - 10.5755/j01.eie.24.4.21475
UR - https://eejournal.ktu.lt/index.php/elt/article/view/21475
SP - 32-37
AB - <p>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.</p><p>DOI: <a href="http://dx.doi.org/10.5755/j01.eie.24.4.21475">http://dx.doi.org/10.5755/j01.eie.24.4.21475</a></p>
ER -