Off-body UWB Channel Characterisation within a Hospital Ward Environment

P Catherwood, W Scanlon

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Received signal strength measurements and delay statistics are presented for both a stationary and mobile user equipped with a wearable UWB radio transmitter within a hospital environment. The measurements were made for both waist and chest mounted antennas using RF-over-fibre technology to eliminate any spurious electromagnetic scattering effects associated with metallic co-axial cables. The results show that received signal strength values were dependent on whether transmit and receive antennas had lineof sight and were also affected by body-shadowing and antenna-body position. For mobile conditions, received signal strength tended to be lognormally distributed with non line of sight links having significantly lower mean values. Excess time delay results for mobile user tests were best described by the Weibull distribution. Overall, the results favoured the chest mounted antenna position, with higher mean signal levels, reduced mean excess delay and less difference between line of sight and non line of sight channels.
LanguageEnglish
Pages263-272
JournalInternational Journal of Ultra Wideband Communications and Systems
Volume1
Issue number4
DOIs
Publication statusPublished - 31 Jul 2010

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Ultra-wideband (UWB)
Antennas
Radio transmitters
Coaxial cables
Weibull distribution
Time delay
Statistics
Scattering
Fibers

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title = "Off-body UWB Channel Characterisation within a Hospital Ward Environment",
abstract = "Received signal strength measurements and delay statistics are presented for both a stationary and mobile user equipped with a wearable UWB radio transmitter within a hospital environment. The measurements were made for both waist and chest mounted antennas using RF-over-fibre technology to eliminate any spurious electromagnetic scattering effects associated with metallic co-axial cables. The results show that received signal strength values were dependent on whether transmit and receive antennas had lineof sight and were also affected by body-shadowing and antenna-body position. For mobile conditions, received signal strength tended to be lognormally distributed with non line of sight links having significantly lower mean values. Excess time delay results for mobile user tests were best described by the Weibull distribution. Overall, the results favoured the chest mounted antenna position, with higher mean signal levels, reduced mean excess delay and less difference between line of sight and non line of sight channels.",
author = "P Catherwood and W Scanlon",
note = "Reference text: Andersen, J.B., Rappaport, T.S. and Yoshida, S. (1995) ‘Propagation measurements and models for wireless communications channels’, IEEE Communications Mag., Vol. 33, Issue 1, pp.42–49. Bultitude, R.J.C., Hahn, R.F. and Davies, R.J. (1998) ‘Propagation considerations for the design of an indoor broad-band communications system at EHF’, IEEE Trans. Vehicular Technology, Vol. 47, 1, pp.235–245. Chong, C. C., and Yong, S. K. (2005) ‘A generic statistical based UWB channel model for high-rise apartments’, IEEE Trans. Antennas and Propagation (Special Issue on Antennas and Propagation Applications), vol. 53, no. 8, pp.2389–2399. Chong, C. C., Kim, Y. and Lee, S. S. (2005) ‘A modified S-V clustering channel model for UWB indoor residential environment’, Proc. IEEE Veh. Technol. Conf. (VTC 2005-Spring), vol. 1, pp. 58-62, Stockholm, Sweden Code of Federal Regulations (CFR), (2008) Title 47–Telecomms, Chapter I, Part 15-Radio Frequency devices. Sect. 15.517 “Technical requirements for indoor UWB systems”, pp. 846–847. Elgharably, R. et al, (2008) ‘Wireless-Enabled Telemedicine System for Remote Monitoring’, Biomedical Engineering Conference, 2008. CIBEC 2008. Cairo International, pp.1-4. Goulianos, A. A. et al, (2009) ‘Wideband Power Modeling and Time Dispersion Analysis for UWB Indoor Off-Body Communications’, IEEE Transactions on Antennas and Prop. vol. 57, no. 7, pp. 2162–2171. Goulianos, A. A., Brown, T., Stavrou, S. (2008) ‘A Novel Path-Loss Model for UWB Off-Body Propagation’, IEEE Vehicular Technology Conference, pp.450–454. Hentila, L. et al, (2005) ‘Measurement and modelling of an UWB channel at hospital’, IEEE Intl. Conf. Ultra-Wideband, pp.113–117. Ho, C. M. P., Rappaport, T. S. and Koushik, P. (1994) ‘Antenna Effects on Indoor Obstructed Wireless Channels and a Deterministic Image-Based Wide-Band Propagation Model for In-Building Personal Communication Systems’, Intl. Journal of Wireless Information Networks, pp.61–76. Hoff, H., Eggers P.C.F. and Kovacs, I.Z. (2003) “Directional indoor ultra wideband propagation mechanisms”, 2003 IEEE 58th Vehicular Technology Conf., VTC 2003, Vol. 1, pp.188–192. Irahhauten, Z. et al, (2005) ‘UWB channel measurements and results for wireless personal area networks applications’, European Conference on Wireless Technology, 2005. 3-4 Oct. 2005. pp.189-192. Karlsson, M. et al, (2005) ‘Wireless system for real-time recording of heart rate variability for home nursing’, Proc. 27th Annual IEEE Eng. in Medicine and Biology Conf., Shanghai, China, pp.3717–3719. 20 Laitinen, H. (1999) ‘Verification of a stochastic radio channel model using a wideband measurement data’, Helsinki University of Technology Master’s Thesis,. Available [online]: http://www.vtt.fi/tte/rd/propagation/Mthesis.pdf Lim, C. P. et al, (2006) ‘Propagation modeling of indoor wireless communications at 60 GHz’, IEEE Antennas and Propagation Society International Symposium, pp. 2149–2152. Oppermann, I. (Ed.), (2004) UWB theory and application. Wiley, UK. Paksuniemi, M. et al, (2005) ‘Wireless sensor and data transmission needs and technologies for patient monitoring in the operating room and intensive care unit’, Proc. 27th Annual IEEE Eng. in Medicine and Biology Conf., Shanghai, China, pp. 5181–5185. Petroff, A. et al, (2003) ‘PulsON P200 UWB radio: simulation and performance results’, 2003 IEEE Conference on Ultra Wideband Systems and Technologies, pp.344–348. Pradabphon, A. Et al (2005). ‘Experimental evaluation scheme of UWB propagation channel with human body’, IEEE Intl Symposium on Communications and Information Technology, 2005. ISCIT 2005. Vol. 1, 12-14 Oct. pp.660-663. Rappaport, T.S. (1996) Wireless communication: Principles and practice, Prentice Hall. Sani, A. et al, (2008) ‘Time domain characterisation of ultra wideband wearable antennas and radio propagation for body-centric wireless networks in healthcare applications’, 5th Intl. Workshop Wearable & Implantable Body Sensor Networks (BSN 2008), Hong Kong. Shin, D. I., Huh, S. J. and Pak, P. J. (2007) ‘Patient monitoring system using sensor network based on the ZigBee radio’, 6th Intl. Conf. Information Technology Applications in Biomedicine, Tokyo, pp.313–315. Takizawa, K. et al, (2008) ‘Channel models for wireless body area networks,’ Proc. 30th Annual IEEE Eng. in Medicine and Biology Conf., pp.1549–1552. Taparugssanagorn, A. et al, (2009) ‘UWB channel modeling for wireless body area networks in medical applications,’ 3rd Intl. Symp. Medical Info. & Comm. Tech., Montreal, Canada. p5. USCB (2008) - U.S. Census Bureau - Population Division, ‘Annual Estimates of the Resident Population by Sex and Five-Year Age Groups for the United States: April 1, 2000 to July 1, 2008’, (NC-EST2008-01). Wong, S.S.M. et al, (2006) ‘Propagation characteristics of UWB radio in a high-rise apartment’, 8th Int. Conf. Advanced Comm. Tech., 2006. ICACT 2006. Vol. 2, pp.913–918.",
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Off-body UWB Channel Characterisation within a Hospital Ward Environment. / Catherwood, P; Scanlon, W.

In: International Journal of Ultra Wideband Communications and Systems, Vol. 1, No. 4, 31.07.2010, p. 263-272.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Off-body UWB Channel Characterisation within a Hospital Ward Environment

AU - Catherwood, P

AU - Scanlon, W

N1 - Reference text: Andersen, J.B., Rappaport, T.S. and Yoshida, S. (1995) ‘Propagation measurements and models for wireless communications channels’, IEEE Communications Mag., Vol. 33, Issue 1, pp.42–49. Bultitude, R.J.C., Hahn, R.F. and Davies, R.J. (1998) ‘Propagation considerations for the design of an indoor broad-band communications system at EHF’, IEEE Trans. Vehicular Technology, Vol. 47, 1, pp.235–245. Chong, C. C., and Yong, S. K. (2005) ‘A generic statistical based UWB channel model for high-rise apartments’, IEEE Trans. Antennas and Propagation (Special Issue on Antennas and Propagation Applications), vol. 53, no. 8, pp.2389–2399. Chong, C. C., Kim, Y. and Lee, S. S. (2005) ‘A modified S-V clustering channel model for UWB indoor residential environment’, Proc. IEEE Veh. Technol. Conf. (VTC 2005-Spring), vol. 1, pp. 58-62, Stockholm, Sweden Code of Federal Regulations (CFR), (2008) Title 47–Telecomms, Chapter I, Part 15-Radio Frequency devices. Sect. 15.517 “Technical requirements for indoor UWB systems”, pp. 846–847. Elgharably, R. et al, (2008) ‘Wireless-Enabled Telemedicine System for Remote Monitoring’, Biomedical Engineering Conference, 2008. CIBEC 2008. Cairo International, pp.1-4. Goulianos, A. A. et al, (2009) ‘Wideband Power Modeling and Time Dispersion Analysis for UWB Indoor Off-Body Communications’, IEEE Transactions on Antennas and Prop. vol. 57, no. 7, pp. 2162–2171. Goulianos, A. A., Brown, T., Stavrou, S. (2008) ‘A Novel Path-Loss Model for UWB Off-Body Propagation’, IEEE Vehicular Technology Conference, pp.450–454. Hentila, L. et al, (2005) ‘Measurement and modelling of an UWB channel at hospital’, IEEE Intl. Conf. Ultra-Wideband, pp.113–117. Ho, C. M. P., Rappaport, T. S. and Koushik, P. (1994) ‘Antenna Effects on Indoor Obstructed Wireless Channels and a Deterministic Image-Based Wide-Band Propagation Model for In-Building Personal Communication Systems’, Intl. Journal of Wireless Information Networks, pp.61–76. Hoff, H., Eggers P.C.F. and Kovacs, I.Z. (2003) “Directional indoor ultra wideband propagation mechanisms”, 2003 IEEE 58th Vehicular Technology Conf., VTC 2003, Vol. 1, pp.188–192. Irahhauten, Z. et al, (2005) ‘UWB channel measurements and results for wireless personal area networks applications’, European Conference on Wireless Technology, 2005. 3-4 Oct. 2005. pp.189-192. Karlsson, M. et al, (2005) ‘Wireless system for real-time recording of heart rate variability for home nursing’, Proc. 27th Annual IEEE Eng. in Medicine and Biology Conf., Shanghai, China, pp.3717–3719. 20 Laitinen, H. (1999) ‘Verification of a stochastic radio channel model using a wideband measurement data’, Helsinki University of Technology Master’s Thesis,. Available [online]: http://www.vtt.fi/tte/rd/propagation/Mthesis.pdf Lim, C. P. et al, (2006) ‘Propagation modeling of indoor wireless communications at 60 GHz’, IEEE Antennas and Propagation Society International Symposium, pp. 2149–2152. Oppermann, I. (Ed.), (2004) UWB theory and application. Wiley, UK. Paksuniemi, M. et al, (2005) ‘Wireless sensor and data transmission needs and technologies for patient monitoring in the operating room and intensive care unit’, Proc. 27th Annual IEEE Eng. in Medicine and Biology Conf., Shanghai, China, pp. 5181–5185. Petroff, A. et al, (2003) ‘PulsON P200 UWB radio: simulation and performance results’, 2003 IEEE Conference on Ultra Wideband Systems and Technologies, pp.344–348. Pradabphon, A. Et al (2005). ‘Experimental evaluation scheme of UWB propagation channel with human body’, IEEE Intl Symposium on Communications and Information Technology, 2005. ISCIT 2005. Vol. 1, 12-14 Oct. pp.660-663. Rappaport, T.S. (1996) Wireless communication: Principles and practice, Prentice Hall. Sani, A. et al, (2008) ‘Time domain characterisation of ultra wideband wearable antennas and radio propagation for body-centric wireless networks in healthcare applications’, 5th Intl. Workshop Wearable & Implantable Body Sensor Networks (BSN 2008), Hong Kong. Shin, D. I., Huh, S. J. and Pak, P. J. (2007) ‘Patient monitoring system using sensor network based on the ZigBee radio’, 6th Intl. Conf. Information Technology Applications in Biomedicine, Tokyo, pp.313–315. Takizawa, K. et al, (2008) ‘Channel models for wireless body area networks,’ Proc. 30th Annual IEEE Eng. in Medicine and Biology Conf., pp.1549–1552. Taparugssanagorn, A. et al, (2009) ‘UWB channel modeling for wireless body area networks in medical applications,’ 3rd Intl. Symp. Medical Info. & Comm. Tech., Montreal, Canada. p5. USCB (2008) - U.S. Census Bureau - Population Division, ‘Annual Estimates of the Resident Population by Sex and Five-Year Age Groups for the United States: April 1, 2000 to July 1, 2008’, (NC-EST2008-01). Wong, S.S.M. et al, (2006) ‘Propagation characteristics of UWB radio in a high-rise apartment’, 8th Int. Conf. Advanced Comm. Tech., 2006. ICACT 2006. Vol. 2, pp.913–918.

PY - 2010/7/31

Y1 - 2010/7/31

N2 - Received signal strength measurements and delay statistics are presented for both a stationary and mobile user equipped with a wearable UWB radio transmitter within a hospital environment. The measurements were made for both waist and chest mounted antennas using RF-over-fibre technology to eliminate any spurious electromagnetic scattering effects associated with metallic co-axial cables. The results show that received signal strength values were dependent on whether transmit and receive antennas had lineof sight and were also affected by body-shadowing and antenna-body position. For mobile conditions, received signal strength tended to be lognormally distributed with non line of sight links having significantly lower mean values. Excess time delay results for mobile user tests were best described by the Weibull distribution. Overall, the results favoured the chest mounted antenna position, with higher mean signal levels, reduced mean excess delay and less difference between line of sight and non line of sight channels.

AB - Received signal strength measurements and delay statistics are presented for both a stationary and mobile user equipped with a wearable UWB radio transmitter within a hospital environment. The measurements were made for both waist and chest mounted antennas using RF-over-fibre technology to eliminate any spurious electromagnetic scattering effects associated with metallic co-axial cables. The results show that received signal strength values were dependent on whether transmit and receive antennas had lineof sight and were also affected by body-shadowing and antenna-body position. For mobile conditions, received signal strength tended to be lognormally distributed with non line of sight links having significantly lower mean values. Excess time delay results for mobile user tests were best described by the Weibull distribution. Overall, the results favoured the chest mounted antenna position, with higher mean signal levels, reduced mean excess delay and less difference between line of sight and non line of sight channels.

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