دانلود رایگان مقاله بررسی خازن کوپلاژ ارتباطات بدن انسان بر اساس انتقال دیجیتال

Abstract

Human body communications (HBC) have been studied as an enabling technology to meet the recently increased demands for low-power and high-simplicity in wireless body area networks for wearable-device applications. Previous works on HBC focused mainly on channel modeling with a measurement method, signal transmission scheme, and transceiver implementation. In particular, the digital transmission, invented as a customized approach for the human body channel, has contributed to develope low-complexity HBC systems. This paper addresses on-going research on capacitive coupling HBC based on digital transmission by exploring recent literature.

5. Conclusion

HBC using the human body as a transmission channel offers intuitive and simple connections without complex wiring, or additional antennas for RF signals. While HBC has great potential to be adopted as a leading communication method for WBAN applications such as sensor network devices on the body, studies on the performance enhancement to secure communication stability regardless of the channel variations due to the different body postures and environments, and lowcomplexity implementation should be performed previously. Among various methods for realizing a HBC system, capacitive coupling achieves better performance than galvanic coupling in a high frequency band for a high data rate, and long distance transmission. In addition, the digital transmission, a customized transmission method for HBC, lowers the implementation complexity without using an ADC, DAC, or RF related blocks. This paper presented a review of on-going research into capacitive coupling HBCs using the digital transmission in terms of channel modeling, methods for data transmission and frame synchronization, and the implementation methodology of the HBC transceiver.