Journal
IEEE JOURNAL OF SOLID-STATE CIRCUITS
Volume 44, Issue 3, Pages 708-717Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2008.2012328
Keywords
Adaptive frequency hopping; body antenna effect; body area network; body channel communication
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Funding
- Korea Evaluation Institute of Industrial Technology (KEIT) [KI001510] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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An interference-resilient 60 kb/s-10 Mb/s body channel transceiver using the human body as a signal transmission medium is designed for multimedia and medical data transaction in body-area network. The body antenna effect which interferes with signals in the human body channel is examined. The body-induced interferences degrade the SIR of the signal to -22 dB in the worst case. In order to overcome the body antenna effect, a 4-channel adaptive frequency hopping scheme using the 30-120 MHz band is introduced to the body channel transceiver. A direct-switching modulator using dual frequency synthesizers and a DLL-based demodulator are proposed for 10 Mb/s FSK and the 4.2 mu s hopping time. The transceiver fabricated with 0.18 mu m CMOS withstands -28 dB SIR and its operating distance is over 1.8 in with -25 dB SIR. Its energy consumption is 0.37 nJ/b with -65 dBm sensitivity.
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