Diversity Performance of Off-Body MB-OFDM UWB-MIMO

Marinova, Marina; Thielens, Arno; Tanghe, Emmeric; Vallozzi, Luigi; Vermeeren, Günter; Joseph, Wout; Rogier, Hendrik; Martens, Luc

doi:10.1109/tap.2015.2422353

Cited by 27 publications

(29 citation statements)

References 35 publications

(72 reference statements)

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“…These localization techniques can be influenced due to the correlation between receivers [18]. In the literature, many research works devoted to study the diversity performance of off-body systems can be found [19]. However, to the best of the authors' knowledge, not many studies about the UWB in-body channel diversity considering experimental scenarios are addressed in literature.…”

mentioning

confidence: 99%

Spatial In-Body Channel Characterization Using an Accurate UWB Phantom

Andreu

Castelló-Palacios

Garcia-Pardo

et al. 2016

IEEE Trans. Microwave Theory Techn.

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Abstract-Ultra-wideband (UWB) systems have emerged as a possible solution for future wireless in-body communications. However, in-body channel characterization is complex. Animal experimentation is usually restricted. Furthermore, software simulations can be expensive and imply a high computational cost. Synthetic chemical solutions, known as phantoms, can be used to solve this issue. However, achieving a reliable UWB phantom can be challenging since UWB systems use a large bandwidth and the relative permittivity of human tissues are frequency dependent. In this paper, a measurement campaign within 3.1-8.5 GHz using a new UWB phantom is performed. Currently, this phantom achieves the best known approximation to the permittivity of human muscle in the whole UWB band. Measurements were performed in different spatial positions, in order to also investigate the diversity of the in-body channel in the spatial domain. Two experimental in-body to in-body (IB2IB) and in-body to on-body (IB2OB) scenarios are considered. From the measurements, new path loss models are obtained. Besides, the correlation in transmission and reception is computed for both scenarios. Our results show a highly uncorrelated channel in transmission for the IB2IB scenario at all locations. Nevertheless, for the IB2OB scenario, the correlation varies depending on the position of the receiver and transmitter.Index Terms-Body area network, in-body communications, path loss, ultra-wideband (UWB) phantom, uncorrelated channel.

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confidence: 99%

Spatial In-Body Channel Characterization Using an Accurate UWB Phantom

Andreu

Castelló-Palacios

Garcia-Pardo

et al. 2016

IEEE Trans. Microwave Theory Techn.

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“…However, the frequency range (3.1-10.6 GHz) is commonly used [3] and [4]. (5) [6] and IEEE 802.15.6 for WBANs [7], and [8].…”

Section: Overview Of Uwbmentioning

confidence: 99%

Recent Approaches to Enhance the Efficiency of Ultra-Wide Band MAC Protocols

Ahmed¹,

Bahig²,

Al-Mahdi³

2017

ijacsa

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Abstract-Ultra-wide band (UWB) is a promising radio technology to transmit huge data in short distances between different digital devices or between individual components of a personal computer. Due to the magnificent features of UWB technology, it finds vast research and application interests, such as Wireless Personal Area Networks (WPANs), Wireless Sensor Networks (WSNs), Wireless Body Area Networks (WBANs) as a special case of WSNs, and Wireless Area Networks (WLANs) as well. In this article, we study the assumptions and performance metrics related to recent schemes of Medium Access Control (MAC) Protocols employed in UWB applications that aim to improve its performance. Also, we compare the different approaches used in the recent works based on 10 parameters: application domain, cast type, protocol centralization, number of hops, mobility, number of used channels, uniformity, priority, and analytical approach. Finally, we introduce different approaches to improve UWB applications.

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“…Measurement conducted in [4] showed that using multiple-input, multiple output antennas drastically improves the reliability of the off-body link. A methodology for determining the optimal positions of these antennas, independent of frequency or communication standard used, was presented in [5].…”

Section: Introductionmentioning

confidence: 99%

“…The performance improvement methods presented in for example, [3][4][5], rely on good understanding of the propagation channel characteristics. An empirical characterization of offbody wireless channels is presented in [6].…”

Section: Introductionmentioning

confidence: 99%