Performance analysis of diversity effect for in-body to on-body wireless UWB link

Authors:
Jingjing Shi;Daisuke Anzai;Jianqing Wang
Affiliations:
Nagoya Institute of Technology, Nagoya, Japan;Nagoya Institute of Technology, Nagoya, Japan;Nagoya Institute of Technology, Nagoya, Japan
Venue:
Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies
Year:
2011

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Cooperative communications in ultra-wideband wireless body area networks: channel modeling and system diversity analysis

IEEE Journal on Selected Areas in Communications - Special issue on body area networking: Technology and applications

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Abstract

The objective of this study is to perform a quantitative performance analysis of diversity effect for in-body to on-body ultra wideband (UWB) transmission for capsule endoscope. UWB technology has a potential to provide real-time image transmission from inside to outside of human body owing to its inherent features. However, it suffers from large attenuation together with shadowing in human tissues. In view of this distinctive property, a diversity scheme is expected to provide an effective improvement on this wireless link performance. Based on finite-difference time-domain (FDTD) numerically-derived in-body to on-body characteristics, we derive probability density function (PDF) for combined communication channels with two different approximation methods and compare their accuracy at first. Then we calculate average bit error rate (BER) with pulse position modulation (PPM) and on-off keying (OOK) modulation scheme to clarify the possible diversity effect.