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In visible light communication (VLC) systems, the employing of orthogonal frequency division multiplexing (OFDM) may produce nonlinear distortion, due to the nonlinear characteristics of LEDs and the high peak to average power ratio (PAPR) of OFDM. Moreover, the clipping block deteriorates the distortion. In this paper, an advanced A-law algorithm for alleviating such distortion in VLC-OFDM systems...
The paper presents a support device for nursing. Several prototypes of assistive devices for feeding gastrostomy have been proposed to provide appropriate pressure for the pressurized bag. A control method for force detection has been also presented. Effectiveness of the proposed device have verified by nurses at hospitals.
Depth from Defocus (DFD) is known as the technology which is able to estimate depth in the scene by a monocular camera without any additive devices. Using this advantage of DFD, we improved the speed of Auto Focus (AF). To apply DFD to AF, it is necessary to capture 2 images that have a small amount of “difference in focal positions” (we call DiFP). In this paper, we show the performance of the depth...
In this paper, we propose an “ANC mute microphone” to attenuate noise caused by singing voice. To verify that an ordinary Filtered-X LMS Algorithm is effective in cancelling singing voice, we conducted simulations and experimented using the DSP kit DSK6713. The simulations show that the attenuation of a singing voice is modestly possible (up to 4 dB). According to the real-time experiment using the...
This paper proposes a super-resolution system for 4K-HDTV. In the basic super-resolution system, the input image is decomposed by the total variation filter into structure and texture components. The structure components are enhanced by the shock filter whereas the texture components are enhanced by the pulse enhancement filter. Two important additional functions are included in the proposed system:...
A new cryptographic standard FPGA board SAKURA-G equipped with a 45-nm Xilinx Spartan-6 was developed to evaluate the security of cryptographic circuits against physical attacks and to measure the hardware performance of encryption algorithms. In addition to its rich array of capabilities, improved power analysis functionality over previous standard boards SASEBO-GII and SASEBO-G is demonstrated thorough...
This paper deals with the intelligent Android application system for smart cane, which helps the visually impaired person to detect an obstacle in their environment and to guide them towards their destination. In addition, it can increase a convenience to the utilization that networks with smart phone. The designed smart cane supports an application to pair it to smart phone. . It uses an ultrasonic...
The proposed method uses a simultaneous pre-charging schema to sensing capacitance change on the sensing pad. In order to compensating the unstable sensing value due to the changing in power supply, an extra reference capacitor pair is adding to the schema. With simultaneous pre-charging schema, all of the sensing capacitors (Cs) including reference capacitors are charged to same voltage level before...
In noisy environments, the influence of music genre, type of noise and volume of music was evaluated using headphones and a portable music player. This report shows that noise in a station concourse is more highly evaluated than pink noise under the condition of the same S/N ratio, and classical music was more highly acclaimed than other music genres. Furthermore a smaller volume of music was better...
Single-array and multiple-array structures were applied to a large-scale planar array for use in uplink space-division multiple access, and their simulated data throughputs were compared. In both structures, a subarray-processing iterative soft-input-soft-output multi-user detector efficiently recovers multi-user signals from multiple RF chains. The phased-array directivity is controlled on the basis...
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