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Dynamic UWB off-body radio channels : human body shadowing effect

Kumpuniemi, Timo; Mäkelä, Juha-Pekka; Hämäläinen, Matti; Yazdandoost, Kamya Yekeh; Iinatti, Jari (2018-02-15)

 
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URL:
https://doi.org/10.1109/PIMRC.2017.8292584

Kumpuniemi, Timo
Mäkelä, Juha-Pekka
Hämäläinen, Matti
Yazdandoost, Kamya Yekeh
Iinatti, Jari
Institute of Electrical and Electronics Engineers
15.02.2018

T. Kumpuniemi, J. P. Mäkelä, M. Hämäläinen, K. Y. Yazdandoost and J. Iinatti, "Dynamic UWB off-body radio channels — Human body shadowing effect," 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), Montreal, QC, 2017, pp. 1-7. doi: 10.1109/PIMRC.2017.8292584

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doi:https://doi.org/10.1109/PIMRC.2017.8292584
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Abstract

Dynamic off-body ultra wideband channels are examined by way of anechoic chamber measurements at a 3–5 GHz frequency band in frequency domain with a help of a fast sweeping vector network analyzer. Five antenna locations on the body are selected: right wrist, left wrist with an antenna on the palm or back side, left arm (AL) and left ankle (LA). The off body node is set at a pole (PO). Two in-house designed and manufactured prototype antennas, dipole and double loop, are used in cases with both similar and dissimilar antennas in a link. Depending on the case, the path loss (PL) ranges between 46.2–87.9 dB. The LA-PO has the highest and AL-PO the lowest average PLs. The PL amplitudes follow the inverse Gaussian distribution. Based on the level crossing rate the LA-PO has the deepest fading conditions and the AL-PO is the most stable link. The LA-PO has the largest average fade duration (AFD) at the thresholds below 0 dB. The AFD is larger on the average with the dipole than the double loop. The comparison of similar vs. dissimilar antenna pairs shows no major difference in the performance.

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