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Biomedical applications in Sensor Networks attract many researchers’ focus, especially in the real-time health status monitoring field. However, the inconvenience of interconnecting sensors through wires not only induces high maintenance cost also limits freedom of human action. By attaching various types of bio-sensors to wireless sensor nodes, the unnatural wire constraints have been removed. The sampled data are transmitted through wireless interface and the system can response in time according to the different vital signs. Unlike wire connections, wireless connections are unstable and vulnerable to environments. It is our goal to study how the wireless links quality affected by human body, we attached sensor nodes onto different parts of human body, and monitor the packets received rate to learn how channels behave. We expect these experiment results can be used to assist the reliable and efficient connections for related biomedical researches

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