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Stencil computation is one of the important kernels in scientific computations, however, the sustained performance is limited by memory bandwidth especially on multi-core microprocessors and GPGPUs due to its small operationalintensity. In this paper, we propose a scalable streaming-array (SSA) of simple soft-processors for high-performance stencil computation on multiple FPGAs. The SSA architecture...
Microwave/millimeter-wave phase and amplitude characteristics using the optically controlled phased array antenna with a single SMF have ever been obtained. In this presentation, we propose the optically controlled phased array antenna with different SMFs for each antenna element. Ideal phases for the beam steering can be obtained by the adjustment of the LD wavelength suitably. First, phase characteristics...
Software visualization with sequence diagrams is one of the promising techniques aimed at helping developers comprehend the behavior of object-oriented systems effectively. However, it is still difficult to understand this behavior, because the size of automatically generated sequence diagrams tends to be beyond the developer's capacity. In this paper, we propose a sequence diagram slicing method,...
Optically controlled beam forming techniques are effective for phased-array antenna control. We have developed the Fourier transform optical beamformer (FT-OBF). In the FT-OBF, the antenna radiation pattern inputted into an amplitude only spatial light modulator is optically Fourier transformed to a specific phase-front light beam equivalent to an antenna excitation distribution. We developed the...
A evaluation method of anisotropic absorber panel is discussed. Anisotropic absorber panel have the axis of anisotropy. Reflection coefficient at the principal axis shows maximum or minimum value. In order to evaluate the principal axis of anisotropic absorber panel, we proposed diagonalization method. By diagonalizing reflection coefficient matrix, reflection coefficients at the principal axis and...
For numerical computations requiring a relatively high ratio of data access to operation, the scalability of memory bandwidth is key to performance improvement. In this paper, we propose a scalable FPGA-array to achieve custom computing machines for high-performance and power-efficient scientific simulations based on difference schemes. With the FPGA-array, we construct a systolic computational-memory...
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