Study On GPU Acceleration Of Thetwo-dimensional FDTD

Finite-Difference Time-Domain method(FDTD),which was first proposed by K.S.Y ee in 1966 and has become an important method for the analysis of the electromagnetic fields In resent decade, It takes lots of time to calculate target electromagnetic scattering with FDTD method because of the requirements of the stability conditions and the way to discrete the Yee grid. Because the FDTD algorithm has natural parallelism advantage, parallel technology is the effective way to improve the computation efficiency. Therefore, the research based on GPU parallel FDTD method is very necessary for FDTD application research to supply a kind of low cost of the parallel computing systemModern Graphic Process Units introduces the concept of data flow parallel processing into scientific computing.It has a strong ability to process the data parallel.As the graphic image processing related industry rapid development, the price of the GPU is not high compared to CPU,But the ability of operation is more than decades to hundreds that of CPU. The current generation of NVIDIA GPUs could effeetively support aVery large number of threads.As a result, they can deliver one to two orders of Magnitude performance inerease inapplieation performance. The calculation speed advantage of GPU in large electromagnetic field is very obvious.In this paper the main work is as follows:1、Introduce the CUDA programming model and framework. It mainly includes the host and device、thread level、hardware mapping、software system and storage system2、The concrete realization method.to use CUDA for FDTD accelerating algorithm. It mainly includes two-dimensional FDTD parallel algorithm based on CUDA 、thread organization form of FDTD parallel algorithm realization process and the relevant code.3、It proves the GPU on acceleration FDTD is correct and practical by the numerical simulation test run time, such as the ratio of acceleration. the GPU acceleration FDTD method is obviousiy effect. One dimensional and two-dimensional numerical examples, the simulation the TEM wave propagation in free space 、point source in the free space of the radiation and scattering of plane wave speed 。Two-dimensional examples are used for the PEC、Mur andUPML three absorbing boundary conditions and the accelerated comparison, at the same time use the same platform launch three kinds of graphics to accelerate by comparing and analyzing the results。...