Development of Biosignal Transmission System Using Reflective Modulation

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  • 反射伝送方式を用いた生体信号伝送システムの開発
  • ハンシャ デンソウ ホウシキ オ モチイタ セイタイ シンゴウ デンソウ システム ノ カイハツ

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Abstract

Daily health monitoring is very important to detect disease in early stage and to keep health. However, there are a lot of difficulties in it. The purpose of this study is to develop an easy and simple system that collects long-term vital sign (ECG in daily life) at home. In order to realize this, we aimed at downsizing and power saving by using reflective modulation for the ECG transmission system. In general, RFID (Radio Frequency IDentification) system uses ASK modulation, however, we employed analog modulation, PFM-AM to solve the problem that occurred in analog signal transmission. The variable impedance antenna, which we developed, allows analog signal transmission without transmitter like conventional RFID system. In order to show the availability of the proposed system, we performed the evaluation experiments with prototype system. It was shown from the experiments that the system could transmit ECG signal in real time, and that the power consumption for the tag type sensor was sufficiently low.

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