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We conduct an emotion recognition study to understand and classify the emotional states of human since the social problems caused by impulsive rage explosions such as the revenge driving, noise floor, and violent crimes. Recently, the emotion recognition technology using electroencephalogram (EEG) has become the foremost consideration of researchers compared with others using voice, facial image,...
Accurate and reliable estimation of multiple coevolving time series over random long-interval consecutive missing values have become the new frontier of the reconstruction discipline. If the problem of missing values cannot be solved, a significant number of important data sets will be improperly analyzed or discarded as they can distort and repudiate the usage of several methodologies. Conventional...
In this paper, class-E power amplifier (PA) with automatic power control loop and load compensation circuit is presented. The transmitted power is controlled by adjusting the signal applied to the gate of the power control transistor. In addition, a parallel capacitor is also controlled to enhance the efficiency and compensate for the load variation. This chip is implemented in a 0.35 µm BCD technology,...
This paper discusses about the characteristics of magnetic field. Experiments are run to examine the received signal strength in soil and metals and compare the rate of attenuation of magnetic field to that of electromagnetic wave. The results reveal that magnetic field has much lower path loss than electromagnetic wave.
A wireless communication system using magnetic fields is a new technology for wireless communication in harsh environments. The system utilizes current loop antennas for radiating magnetic fields on which a signal is loaded. The target application of this system is monitoring the status of buildings, bridges, underground pipes, etc. The amount of data which is required to be transferred is not huge...
A magnetic field communication system utilizes magnetic induction to transmit data, providing a high quality wireless communication service in a harsh environment whereas the previous wireless communication system has many problems. In general, the magnetic field communication system is used in the environment surrounded by soil, metal, and fluid. A wireless power transfer system transfers energy...
Sign language data can be expressed as the positional changes of hands over time. Although increasing the number of hand movement sensors increases the recognition rate, the data scales become larger. In addition, each sign language data has a different duration. When large data are generated continuously, lower memory usage and a standardized form of data are necessary to be applied immediately in...
A new wireless communication system using a low frequency signal transmitted by current loop antennas is proposed. The communication range is relatively small (about several meters) so that the range is included in near field of a carrier signal. The use of magnetic fields makes it possible to provide high quality communication in an unfavorable environment where metal or fluids are present. In addition,...
EEG based brain computer interface has provided a new communication pathway between the human brain and the computer. It can be used for handicap or disabled users to interact with human using the computer interface. It can also be used in controlling human's muscles movement. In this paper, we show that meaningful information can be extracted from EEG signal through incremental approach. We applied...
This paper proposes a low-complexity single frequency estimator for flat fading channels. The simplified estimator decreases the number of computations in the calculation of the auto correlation function (AF) when compared to AF-based conventional estimators. The simplified estimator yields a comparable estimation performance to the existing estimators, while retaining the same frequency range
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