Takanori Ohira

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Recently, many studies in wireless ad hoc networks assume the use of smart antennas which can electronically control their beam pattern. Communications using smart antennas can be expected to improve spatial utilization efficiency and to extend communication distance. However, there are some unique problems caused by the use of the smart antennas. In this(More)
This paper presents a novel hardware-oriented stereo vision system based on 1-D cost aggregation. Many researchers have implemented hardware efficient stereo matching to realize real-time systems. However, such methods require a large amount of memory. We proposed a system that is based on a hardware-software hybrid architecture for memory reduction. It(More)
In this paper, we propose a novel spatial fading simulator to evaluate the performance of an array antenna and show its spatial stochastic characteristics by computer simulation, based on parameters verified by experimental data. We introduce a cavity-excited circular array (CECA) as a fading simulator that can simulate realistic mobile communication(More)
This paper presents an FPGA implementation of a memory-efficient stereo vision algorithm. Recently, a hardwareoriented stereo vision algorithm using 1-D guided filtering was proposed [1]. Our architecture is based on this algorithm and calculates the depth map in 1-D space, and therefore, the required amount of memory is significantly reduced. To realize(More)
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