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A human body communication transceiver based on on-off keying modulation

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5 Author(s)
Tengfei Leng ; Inst. of Biomed. & Health Eng., Shenzhen Univ. Town, Shenzhen, China ; Zedong Nie ; Wenchen Wang ; Feng Guan
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This paper presents an on-off keying (OOK) human body communication (HBC) transceiver design method for wireless body-area network (WBAN). The HBC channel in shield chamber by adopting floating ground experiment setup is analyzed and the optimal carrier frequency of 30 MHz is chosen. A FPGA and a direct-digital synthesizer (DDS) are applied to achieve OOK modulation in the HBC transmitter. In the receiver part, the signal is firstly filtered by a band pass filter, and then converted to voltage through a logarithmic amplifier. Finally a comparator and a clock data recover (CDR) circuit are used to recovery the data. The proposed HBC transceiver is implemented in a PCB board and validated in human body. The result shows that the transceiver can transfer 2-Mbps none return zero (NRZ) data from forearm to finger through the human body successfully.

Published in:

Bioelectronics and Bioinformatics (ISBB), 2011 International Symposium on

Date of Conference:

3-5 Nov. 2011