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The ZigBee-based bioimpedance device presented in this paper allows reliable, low-power, and real-time monitoring of abdominal fatness. The feasibility of the presented analog front-end has been validated through simulations using equivalent circuits as the patient under test. Abdominal impedance parameters of the individual under monitoring are measured, based on the magnitude-ratio detection method, are then amplified by a dedicated analog front-end, are subsequently converted into the digital domain, and are finally wirelessly transmitted. The overall wireless sensor network briefly described above is currently being developed for supporting visceral fat measurements in adults across a range of body mass index.
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