Bit-Error-Rate Over-The-Air Testing of Weighted-Polarization BAN Antenna Using an Arm-Swinging Dynamic Phantom

Q4 Engineering Transactions of Japanese Society for Medical and Biological Engineering Pub Date : 2016-01-01 DOI:10.11239/JSMBE.54ANNUAL.1OS4-3-5-1

K. Honda, K. Murata, Kun Li, K. Ogawa, Y. Koyanagi, Hiroshi Sato, Ritsu Miura

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Abstract

In healthcare data radio system, it is essential to avoid the communication disconnection when the transmission signal bit error rate (BER) exceeds a specific value. When the BAN antenna is attached at wrist, the polarization characteristics will be varied significantly according to the antenna rotation angle caused by the arm-swing motion. In this paper, the BER characteristic of a weighted-polarization BAN antenna considering human walking motion is measured while the validity of the proposed antenna is verified. At first, a method of BER Over-The-Air (OTA) Testing is proposed, where a fading emulator is utilized for realizing the actual propagation environment. Then, the BER measurement is carried out in considerations of the arm-swing motion using a human phantom. Compared with the conventional antenna, less SNR is required when the weighted-polarization BAN antenna is used to obtain the desired BER, indicating the effectiveness of proposed weighted-polarization antenna for BAN wireless applications.

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基于摆臂动态模体的加权极化BAN天线空中误码率测试

在医疗数据无线电系统中，避免传输信号误码率(BER)超过一定值导致通信中断是至关重要的。当BAN天线安装在手腕上时，手臂摆动引起的天线旋转角度会使其极化特性发生显著变化。本文测量了考虑人体行走运动的加权极化BAN天线的误码率特性，并验证了该天线的有效性。首先，提出了一种无线误码率测试方法，利用衰落模拟器来实现实际的传播环境。然后，在考虑手臂摆动运动的情况下，利用人体幻影进行误码率测量。与传统天线相比，采用加权极化BAN天线获得理想的误码率所需的信噪比较低，表明该加权极化天线在BAN无线应用中的有效性。

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Transactions of Japanese Society for Medical and Biological Engineering Engineering-Biomedical Engineering

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