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 language | English |
|---|---|
| Article number | 6756942 |
| Pages (from-to) | 495-498 |
| Number of pages | 4 |
| Journal | IEEE Antennas and Wireless Propagation Letters |
| Volume | 13 |
| DOIs | |
| Publication status | Published - 2014 |
| Externally published | Yes |
Keywords
- Body area networks
- channel capacity
- multiple-input-multiple- output (MIMO)
- on-body channels
- ultrawideband
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