On the capacity limits of HVAC duct channel for high-speed Internet access

Ariton E. Xhafa, Ozan K. Tonguz, Ahmet G. Cepni, Daniel D. Stancil, Pavel V. Nikitin, and Dagfin Brodtkorb. On the capacity limits of HVAC duct channel for high-speed Internet access. IEEE Transactions on Communications, 53(2):335– 342, Feb. 2005.

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Abstract

In this paper, we report theoretical and experimental channel-capacity estimates of heating, ventilation, and air condi- tioning (HVAC) ducts based on multicarrier transmission that uses -ary quadrature amplitude modulation and measured channel responses at the 2.4-GHz industrial, scientific, and medical band. It is shown theoretically that data rates in excess of 1 Gb/s are possible over distances up to 500 m in straight ducts in which reflections have been suppressed. Our experimental results also show that even in the case of more complex HVAC duct networks (i.e., HVAC duct net- works that include bends, tees, etc.) data rates over 2 Gb/s are pos- sible. Our estimations in this case are valid for distances of up to 22 m, which was the maximum distance of our experimental setup. These experimental results, measured with a large-scale testbed set up at Carnegie Mellon University, Pittsburgh, PA, albeit limited in terms of transmitter?receiver separation distance, provide further evidence on the potential of HVAC systems as an attractive solution for providing communications in indoor wireless networks.

BibTeX

@ARTICLE{xhafa_tran-comm_2005,
  author = {Ariton E. Xhafa and Ozan K. Tonguz and Ahmet G. Cepni and Daniel
	D. Stancil and Pavel V. Nikitin and Dagfin Brodtkorb},
  title = {On the capacity limits of HVAC duct channel for high-speed Internet
	access},
  journal = {IEEE Transactions on Communications},
  year = {2005},
  volume = {53},
  pages = {335- 342},
  number = {2},
  month = {Feb.},
  abstract = {In this paper, we report theoretical and experimental 
	channel-capacity estimates of heating, ventilation, and air condi-
	tioning (HVAC) ducts based on multicarrier transmission that uses
	-ary quadrature amplitude modulation and measured channel 
	responses at the 2.4-GHz industrial, scientific, and medical band.
	It 
	is shown theoretically that data rates in excess of 1 Gb/s are possible
	over distances up to 500 m in straight ducts in which reflections
	have 
	been suppressed. Our experimental results also show that even in 
	the case of more complex HVAC duct networks (i.e., HVAC duct net-
	works that include bends, tees, etc.) data rates over 2 Gb/s are pos-
	sible. Our estimations in this case are valid for distances of up
	to 
	22 m, which was the maximum distance of our experimental setup. 
	These experimental results, measured with a large-scale testbed set
	up at Carnegie Mellon University, Pittsburgh, PA, albeit limited in
	terms of transmitter?receiver separation distance, provide further
	evidence on the potential of HVAC systems as an attractive solution
	for providing communications in indoor wireless networks.},
  owner = {henty},
  pdf = {xhafa_capacity_limits_duct_channel_internet_access_tran_comm05.pdf},
  timestamp = {2006.06.25},
}

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