Body Area Networks: Smart IoT and Big Data for Intelligent Health Management. 14th EAI International Conference, BODYNETS 2019, Florence, Italy, October 2-3, 2019, Proceedings

Research Article

Pseudo-dynamic UWB WBAN Off-Body Radio Channel Measurements – Preliminary Results

  • @INPROCEEDINGS{10.1007/978-3-030-34833-5_30,
        author={Timo Kumpuniemi and Juha-Pekka M\aa{}kel\aa{} and Matti H\aa{}m\aa{}l\aa{}inen and Jari Iinatti},
        title={Pseudo-dynamic UWB WBAN Off-Body Radio Channel Measurements -- Preliminary Results},
        proceedings={Body Area Networks:  Smart IoT and Big Data for Intelligent Health Management. 14th EAI International Conference, BODYNETS 2019, Florence, Italy, October 2-3, 2019, Proceedings},
        proceedings_a={BODYNETS},
        year={2019},
        month={11},
        keywords={Ultra wideband Wireless body area network Channel model},
        doi={10.1007/978-3-030-34833-5_30}
    }
    
  • Timo Kumpuniemi
    Juha-Pekka Mäkelä
    Matti Hämäläinen
    Jari Iinatti
    Year: 2019
    Pseudo-dynamic UWB WBAN Off-Body Radio Channel Measurements – Preliminary Results
    BODYNETS
    Springer
    DOI: 10.1007/978-3-030-34833-5_30
Timo Kumpuniemi1,*, Juha-Pekka Mäkelä1, Matti Hämäläinen1, Jari Iinatti1
  • 1: University of Oulu
*Contact email: timo.kumpuniemi@oulu.fi

Abstract

This paper presents measurement results on pseudo-dynamic ultra wideband off-body wireless body area network radio channels. The measurements are performed in an anechoic chamber in a 2–8 GHz frequency band by utilizing a vector network analyzer. A dynamic walking sequence was modeled by a test person who took five different body postures which were each measured statically. As a result, when observed together, the five postures can be used to model a dynamic walking sequence as in a cinema film. The antennas were attached on left and right wrist, and left ankle. The off-body antenna node was set on a pole. The work was repeated for two prototype antenna types: dipole and double loop. The mean attenuations of the first arriving paths were noted to lie between −52… − 68 dB. No large differences were noted between the body postures. The link between left ankle and the pole had the largest attenuation. The averaged channel impulse response durations were noted to lie between eight to nine taps, where one tap corresponds to 0.167 ns in time. The dynamic range on the averaged link types shows values between 17…28 dB. No clear difference was noted in the performance between the antenna types.