Experimental evaluation of MIMO capacity for ultrawideband body-centric wireless propagation channels

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Abstract

In this letter, the capacity of ultrawideband (UWB) multiple-input- multiple-output (MIMO) on-body channels is evaluated. Three on-body channels are investigated - namely, Chest-Waist, Wrist-Waist, and Ankle-Waist channels. The data transmission capacities of each channel are evaluated and presented using the two power allocations schemes - namely, equal power allocation and the waterfilling power allocation. Statistical analysis is performed on the MIMO channel data, and the Rician K -factors of the channels are analyzed. It is found that the waterfilling scheme outperforms the equal power scheme in terms of capacity for all three on-body channels, with an average improvement of 1.2 b/s/Hz for signal-to-noise ratio (SNR) less than 12 dB (percentage improvement of 187% at 0 dB and 100% at 8 dB). However, the performances of the two schemes become comparable as the SNR increases with less than 0.28 b/s/Hz difference (percentage improvement of 3.6%) at an SNR level of 20 dB.

Original languageEnglish
Article number6756942
Pages (from-to)495-498
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Volume13
DOIs
Publication statusPublished - 2014

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Keywords

  • Body area networks
  • channel capacity
  • multiple-input-multiple- output (MIMO)
  • on-body channels
  • ultrawideband

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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