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Indoor off-body wireless MIMO communication with dual polarized textile antennas

Patrick Van Torre (UGent) , Luigi Vallozzi (UGent) , Carla Hertleer (UGent) , Hendrik Rogier (UGent) , Marc Moeneclaey (UGent) and Jo Verhaevert (UGent)
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Abstract
Off-body data communication for firefighters and other rescue workers is an important area of development. The communication with a moving person in an indoor environment can be very unreliable due to channel fading. In addition, when considering off-body communication by means of textile antennas, propagation is affected by shadowing caused by the human body. By transmitting and receiving signals using multipleinput, multiple-output antennas (MIMO communication) a large improvement in reliability of the wireless link is obtained. In this contribution, the performance of wireless data communication using quadrature phase shift keyed (QPSK) modulated data in the 2.45 GHz ISM-band is evaluated in the case of firefighters walking indoor and communicating by means of a compact dualpattern dual-polarization diversity textile patch antenna system integrated into their clothing. Simultaneous transmit diversity (at the firefighter) and receive diversity (at the base station) up to fourth order are achieved by means of orthogonal space-time codes, providing a maximum total diversity order of 16. The measurements confirm that MIMO techniques drastically improve the reliability of the wireless link. Measurements are compared for three test persons of significantly different sizes. For equal transmitted power levels, the bit error rates for the 2×2 and 4 × 4 links are much lower than for a system without diversity, with the 4 × 4 system clearly providing the best performance.
Keywords
Diversity, Bit error rate, ISM band, MIMO, Multiple-input multiple-output (MIMO) systems, Receiving antennas, Space-time codes, Textile antennas, Textiles, Body-centric, Transmitting antennas, Antenna measurements

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Chicago
Van Torre, Patrick, Luigi Vallozzi, Carla Hertleer, Hendrik Rogier, Marc Moeneclaey, and Jo Verhaevert. 2011. “Indoor Off-body Wireless MIMO Communication with Dual Polarized Textile Antennas.” Ieee Transactions on Antennas and Propagation 59 (2): 631–642.
APA
Van Torre, P., Vallozzi, L., Hertleer, C., Rogier, H., Moeneclaey, M., & Verhaevert, J. (2011). Indoor off-body wireless MIMO communication with dual polarized textile antennas. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 59(2), 631–642.
Vancouver
1.
Van Torre P, Vallozzi L, Hertleer C, Rogier H, Moeneclaey M, Verhaevert J. Indoor off-body wireless MIMO communication with dual polarized textile antennas. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION. 2011;59(2):631–42.
MLA
Van Torre, Patrick, Luigi Vallozzi, Carla Hertleer, et al. “Indoor Off-body Wireless MIMO Communication with Dual Polarized Textile Antennas.” IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 59.2 (2011): 631–642. Print.
@article{1110144,
  abstract     = {Off-body data communication for firefighters and other rescue workers is an important area of development. The communication with a moving person in an indoor environment can be very unreliable due to channel fading. In addition, when considering off-body communication by means of textile antennas, propagation is affected by shadowing caused by the human body. By transmitting and receiving signals using multipleinput, multiple-output antennas (MIMO communication) a large improvement in reliability of the wireless link is obtained. In this contribution, the performance of wireless data communication using quadrature phase shift keyed (QPSK) modulated data in the 2.45 GHz ISM-band is evaluated in the case of firefighters walking indoor and communicating by means of a compact dualpattern dual-polarization diversity textile patch antenna system integrated into their clothing. Simultaneous transmit diversity (at the firefighter) and receive diversity (at the base station) up to fourth order are achieved by means of orthogonal space-time codes, providing a maximum total diversity order of 16. The measurements confirm that MIMO techniques drastically improve the reliability of the wireless link. Measurements are compared for three test persons of significantly different sizes. For equal transmitted power levels, the bit error rates for the 2{\texttimes}2 and 4 {\texttimes} 4 links are much lower than for a system without diversity, with the 4 {\texttimes} 4 system clearly providing the best performance.},
  author       = {Van Torre, Patrick and Vallozzi, Luigi and Hertleer, Carla and Rogier, Hendrik and Moeneclaey, Marc and Verhaevert, Jo},
  issn         = {0018-926X},
  journal      = {IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION},
  keyword      = {Diversity,Bit error rate,ISM band,MIMO,Multiple-input multiple-output (MIMO) systems,Receiving antennas,Space-time codes,Textile antennas,Textiles,Body-centric,Transmitting antennas,Antenna measurements},
  language     = {eng},
  number       = {2},
  pages        = {631--642},
  title        = {Indoor off-body wireless MIMO communication with dual polarized textile antennas},
  url          = {http://dx.doi.org/10.1109/TAP.2010.2096389},
  volume       = {59},
  year         = {2011},
}

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