Experimental Investigation of Ultra Wideband Diversity Techniques for on-Body Radio Communications

Abbasi, Qammer H.; Khan, Mohammad Monirujjaman; Liaqat, Sidrah; Kamran, Muhammad; Alomainy, Akram; Hao, Yang

doi:10.2528/pierc12083102

Cited by 39 publications

(38 citation statements)

References 22 publications

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“…It has been investigated both in offbody [5][6][7] and in-body cases [8]. Perhaps the majority of the published papers are related to the various aspects of on-body situations [9][10][11][12]. For instance, in [7,[13][14][15] research related to UWB onbody radio channels are reported.…”

Section: Introductionmentioning

confidence: 99%

Categorized Uwb on-Body Radio Channel Modeling for Wbans

Kumpuniemi¹,

Hämäläinen²,

Yazdandoost³

et al. 2016

PIER B

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Abstract-A categorized radio channel modeling for wireless ultra-wideband on-body body area networks is discussed. Measurements in an anechoic chamber at fourteen antenna locations are conducted in a 2-8 GHz band. The dipole and double loop antenna types are used. Six link classes are formed based on the antenna spots on the torso, head or limb. The limb-limb and the head-limb links have the lowest and highest path losses, respectively. The head-limb links have the shortest channel impulse responses (CIRs) and limb-limb links the longest ones. The CIR amplitudes follow the inverse Gaussian distribution. The tap indexes and the total excess delays are modeled with the negative binomial distribution. In most cases, the CIRs decay faster for the dipole. Otherwise no major differences exist between the antennas.

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Section: Introductionmentioning

confidence: 99%

Categorized Uwb on-Body Radio Channel Modeling for Wbans

Kumpuniemi¹,

Hämäläinen²,

Yazdandoost³

et al. 2016

PIER B

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“…In [7][8][9][10][11][12][13][14], on-body radio channel characterisation was presented at the unlicensed frequency band of 2.45 GHz. UWB on-body radio propagation channel characterisation for body-centric wireless networks have been presented extensively in the open literature [15][16][17][18][19][20][21][22][23][24][25][26][27]. However, the sizes and shapes of the different human bodies will affect the propagation path and lead to different system performances.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Subject-Specific On-Body Radio Propagation Channels for Body-Centric Wireless Communications

et al. 2014

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Abstract:In this paper, subject-specific narrowband (2.45 GHz) and ultra-wideband (3-10.6 GHz) on-body radio propagation studies in wireless body area networks (WBANs) were performed by characterizing the path loss for eight different human subjects of different shapes and sizes. The body shapes and sizes of the test subjects used in this study are characterised as thin, medium build, fatty, shorter, average height and taller. Experimental investigation was made in an indoor environment using a pair of printed monopoles (for the narrowband case) and a pair of tapered slot antennas (for the ultra-wideband (UWB) case). Results demonstrated that, due to the different sizes, heights and shapes of the test subjects, the path loss exponent value varies up to maximum of 0.85 for the narrowband on-body case, whereas a maximum variation of the path loss exponent value of 1.15 is noticed for the UWB case. In addition, the subject-specific behaviour of the on-body radio propagation channels was compared between narrowband and UWB systems, and it was deduced that the on-body radio channels are subject-specific for both narrowband and UWB system cases, when the same antennas (same characteristics) are used. The effect of the human body shape and size variations on the eight different on-body radio channels is also studied for both the narrowband and UWB cases.

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“…From the measurement data it can also be concluded that at the higher frequencies the values of the mutual coupling are lower thanks to the better isolation between the antennas. For all antenna pairs, the mutual coupling remains below -15 dB over the investigated frequency band and, as stated in [18], mutual coupling below that value can be neglected. Therefore, our assumption that the mutual coupling between the antennas can be neglected is valid.…”

Section: ) Uwb Antennamentioning

confidence: 99%

“…Further on, in contrast to most of the research on UWB BANs, which apply pulsed signals and focus on on-body communication, e.g. [15], [17], [18], [20], etc., our focus is on off-body MB-OFDM UWB systems. The use of MB-OFDM technique allows lower power consumption and longer propagation distances [7].…”

Section: ) Uwb Antennamentioning

confidence: 99%

“…The behavior of the frequencydomain and the delay-domain spatial correlation for systems operating at 3-6 GHz and 3-10 GHz is investigated in [17]. Different spatial diversity techniques for UWB on-body systems operating in the 3-10 GHz band and using two receiving antennas are presented in [18], [19]. The frequency-space-polarization of an UWB MIMO system over three different frequency bands (3-6, 6-10, 3-10 GHz) is investigated in [20].…”

Section: Introductionmentioning

confidence: 99%

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

Marinova

Thielens

Tanghe

et al. 2015

IEEE Trans. Antennas Propagat.

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Abstract-This paper introduces a novel formalism to improve the performance of an off-body system by deploying multiple Ultra Wide Band (UWB) antennas, positioned strategically on the body. A methodology is presented for determining the optimal positions of UWB antennas on the body, necessary to provide a reliable Mult-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) UWB diversity antenna system operating in the Federal Communications Commission frequency band between 3.1 and 10.6 GHz. By evaluating the diversity metric, using simulation and measurement data, it is shown that the performance of such a system is stable throughout the entire investigated frequency band for both indoor and outdoor environments. There is a good agreement between the simulated and measured diversity values with a deviation of less than 9%. Therefore, the proposed technique optimizes the antennas' positions for maximum diversity performance within a very broad frequency band, independent of the used wireless communication standard. Thus, the obtained diversity system might be used in any kind of wireless communication link within that frequency band, e.g. UWB-OFDM, UWB MB-OFDM, UWB or even narrowband transmission.

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Experimental Investigation of Ultra Wideband Diversity Techniques for on-Body Radio Communications

Cited by 39 publications

References 22 publications

Categorized Uwb on-Body Radio Channel Modeling for Wbans

Categorized Uwb on-Body Radio Channel Modeling for Wbans

Experimental Investigation of Subject-Specific On-Body Radio Propagation Channels for Body-Centric Wireless Communications

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

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