Exploiting multiple-input multiple-output in the personal sphere

Neirynck, Dries; Williams, C.; Nix, Andrew R; Beach, M.A.

doi:10.1049/iet-map:20060210

Cited by 18 publications

(6 citation statements)

References 13 publications

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“…The other reason may be due to the fact that the communication is over a short range and the assumption of the planar wave-front may not be valid. This means that the spherical wave-front is being exploited to achieve high capacities, as explained in [7]. Thirdly, it has been shown in [8] that at higher SNR values, there is less decrease in capacity due to high correlation.…”

Section: Channel Capacitymentioning

confidence: 98%

Multiple antenna systems for increasing on-body channel capacity and reducing BAN-to-BAN interference

Khan

Hall

Nechayev

et al. 2010

2010 International Workshop on Antenna Technology (iWAT)

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The application of multiple-input multiple-output (MIMO) in body-area networks (BAN) is considered in the paper. The correlations between MIMO sub-channels and the MIMO channel capacity are investigated for three on-body channels when random movements are performed in an indoor environment. Some of the MIMO sub-channels were found to be correlated. Nevertheless, a significant capacity increase due to use of MIMO was still observed thus demonstrating the feasibility of using MIMO in BAN communications. A simple BAN-to-BAN interference rejection method which makes use of interrupted transmission is also proposed in the paper, and is shown to produce interference rejection gains significantly higher than those produced by two conventional interference rejection methods.

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Section: Channel Capacitymentioning

confidence: 98%

Multiple antenna systems for increasing on-body channel capacity and reducing BAN-to-BAN interference

Khan

Hall

Nechayev

et al. 2010

2010 International Workshop on Antenna Technology (iWAT)

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“…Early researches carried out by Foschini [10] and Telatar [11], have predicted important spectral efficiencies for multiple antennas wireless channels in the presence of a rich scattering environment. The effects of using MIMO systems in BANs have been investigated in few studies such as in [12], [13]. It appears that the body channels are experiencing more or less a high correlation among the spatial subchannels, a power imbalance at the receive antenna elements, and a mutual coupling between the spatially separated antennas.…”

Section: Introductionmentioning

confidence: 99%

“…It appears that the body channels are experiencing more or less a high correlation among the spatial subchannels, a power imbalance at the receive antenna elements, and a mutual coupling between the spatially separated antennas. All these factors may have a drastic effect the capacity of MIMO systems [12]- [14]. The other motivation of this work is that, according to the author's knowledge, the capacity of body-to-body channels with MIMO body-worn antennas has not been addressed yet.…”

Section: Introductionmentioning

confidence: 99%

“…This may be due to the aforementioned capacity limiting factors present in body channels. Furthermore, when the channel capacity has been evaluated in on-body case such as in [12], [13], equal power distribution was solely investigated. In this communication, we will evaluate the achievable average capacity when adopting both uniform power and waterfilling schemes in body-to-body channels using different types of antennas and will compare it to the on-body channels.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Channel Correlation and Path Loss on Average Channel Capacity of Body-to-Body Systems

Ghanem

2013

IEEE Trans. Antennas Propagat.

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The channel capacity in body channels is of great importance since it determines the amount and type of data that can be transmitted using the body as a media for communication. In this communication, the average capacity of body-to-body channels, where the transmitter and the receiver are on different human bodies, is investigated in an indoor wireless environment when using multiple antennas at the transmitter and the receiver, the so-called MIMO system. Different types of antennas are studied, namely PIFA, inverted IFA and monopole antennas, and the capacity in these channels is compared to on-body case. The impingement of the spatial correlation due to the presence of a high line of sight (LOS) component, on the average capacity is also studied. The effect of path loss on average capacity is asserted as well.Index Terms-Body-to-body channels, channel capacity, multiple-input multiple-output (MIMO), on-body channels.

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“…Many papers on off-body communication characterize the channel, based on signal levels without performing any actual data transmission [5][6][7][8][9][10][11][12][13][14]. Some of the references document the behavior of fixed wireless interfaces with the channel variation occurring due to moving scatterers [15].…”

Section: Introductionmentioning

confidence: 99%

Channel Characterization and Robust Tracking for Diversity Reception over Time-Variant Off-Body Wireless Communication Channels

Torre

Vallozzi

Rogier

et al. 2010

EURASIP J. Adv. Signal Process.

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In the 2.45 GHz band, indoor wireless off-body data communication by a moving person can be problematic due to time-variant signal fading and the consequent variation in channel parameters. Off-body communication specifically suffers from the combined effects of fading, shadowing, and path loss due to time-variant multipath propagation in combination with shadowing by the human body. Measurements are performed to analyze the autocorrelation, coherence time, and power spectral density for a person equipped with a wearable receive system moving at different speeds for different configurations and antenna positions. Diversity reception with multiple textile antennas integrated in the clothing provides a means of improving the reliability of the link. For the dynamic channel estimation, a scheme using hard decision feedback after MRC with adaptive low-pass filtering is demonstrated to be successful in providing robust data detection for long data bursts, in the presence of dramatic channel variation.

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Exploiting multiple-input multiple-output in the personal sphere

Cited by 18 publications

References 13 publications

Multiple antenna systems for increasing on-body channel capacity and reducing BAN-to-BAN interference

Multiple antenna systems for increasing on-body channel capacity and reducing BAN-to-BAN interference

Effect of Channel Correlation and Path Loss on Average Channel Capacity of Body-to-Body Systems

Channel Characterization and Robust Tracking for Diversity Reception over Time-Variant Off-Body Wireless Communication Channels

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