Determining Received Voltage Using Received Signal Strength Indication (RSSI) In Human Body Communication at 10.7MHz

抄録

Human body communication (HBC) is a communication technique using human body and the environment surround body as a transmission medium. This technique which was introduced in 1995 has been a subject of attention from time to time. Most of previous studies about transmission characteristics of HBC used professional measurement instruments (such as oscilloscope, VNA or signal generator combining with ground isolators namely baluns, transformers) to measure. Those setups effect on an accurate because of creating a new parasitic paths between instruments. In this study, a battery-powered transmitter (Tx) and receiver (Rx) are created to measure channel gain. Received signal voltages are displayed on LCD integrated into Rx. Initially, our measurement setup has positions of transmitter (Tx) and receiver (Rx) as other studies to comparison with previous studies. On the other hand, we change the position of Rx to determine where are suitable for health monitoring applications. In reality, determining transmission characteristics of communication channel often mentions SNR at the receiver. Hence, we also measure noise power level at Rx by spectrum analyzer. Base on that, we recommend BER standard for health monitoring data transmission applications.