Articles
Moving Window Finite Difference Time Domain On A Graphic Processor Unit
April 16, 2009
By Jamie Knapil, James Stack, Joseph Schuster, and Steve Fast, Remcom, Inc.
Abstract: With the need for real time propagation growing each day, a new way to simulate propagation models is needed that is closer to real time while maintaining the same amount of accuracy. The way to get the most accurate results is to use a high fidelity model such as a Finite Difference Time Domain (FDTD) model. This model is limited in space and computational resources. With the way the algorithm is calculated, the computational space can become massive very quickly. Therefore modeling long distances can be impossible. One way around that is to employ a method called Moving Window Finite Difference Time Domain (MWFDTD). This method only takes into account the area around the pulse. However, this is not close to real time due to computational intensity. One way to make this faster would be to make the calculations faster by using a Graphics Processor Unit (GPU). The GPU can be used to speed up the calculations like those found within MWFDTD. This idea can then be expanded to include other models; it is just not limited to MWFDTD.
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