The effect of human body on indoor radio wave propagation at 57&amp;#x2013;64 GHz

Fakharzadeh, Mohammad; Ahmadi‐Shokouh, Javad; Biglarbegian, B.; Nezhad-Ahmadi, Mohammad-Reza; Safavi-Naeini, S.

doi:10.1109/aps.2009.5172000

Cited by 10 publications

(8 citation statements)

References 4 publications

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“…The mmWave radio links have high propagation losses and are very sensitive to blockages that cause significant variations in the channel depending on the type of obstacle (furniture, people, walls, etc.) and its relative position [4]. Measurements presented in [5] showed that the human blockage causes attenuation greater than 20 dB and the shadowing effect depends more on the antennas configurations than the number of persons.…”

Section: Introductionmentioning

confidence: 98%

Angular Measurements and Analysis of the Indoor Propagation Channel at 60 GHz

Hajj

Zein

Zaharia

et al. 2019

2019 International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)

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In this work, we present a propagation measurements campaign conducted at 60 GHz in a typical indoor office environment. These measurements can be useful in order to exploit multipaths, aiming to maintain the quality of the communication in the case of blocking the direct path due to an obstruction created by people, furniture or other obstacles. The measurements were realized on 2 GHz bandwidth using a vector network analyzer (VNA). At the receiving side being always visible by the transmitter, a rotation by 6 • over 360 • is performed. The obtained results allow to compute different channel parameters such as: path loss, RMS delay spread and coherence bandwidth. In our study, we consider for each receiver position two situations: the direct orientation and the best indirect orientation of the receiving antenna. These results show that the path loss of the best indirect orientation increases up to 18 dB compared to the direct orientation. Indeed, some positions may be more affected than others in the case of blocking the direct orientation. The obtained results will be useful both to design the new broadband communication systems and to deploy wireless local and personal area networks (WLAN/WPAN) operating in the millimeter-wave (mmWave) bands. Index Terms-60 GHz, indoor radio channel, measurements, VNA, path loss, RMS delay spread, coherence bandwidth, angle of arrival

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Section: Introductionmentioning

confidence: 98%

Angular Measurements and Analysis of the Indoor Propagation Channel at 60 GHz

Hajj

Zein

Zaharia

et al. 2019

2019 International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)

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show abstract

“…Also, the effects of different antenna types should be considered at mm-wave bands. For narrow beam width and high antenna gain, the human body can adequately degrade the signal power by dramatically shadowing the main paths between transmitter and receiver [7] [8].…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Wave Propagation Measurements at 60 GHz in Indoor Environments

Hajj¹,

Zaharia²,

Zein³

et al. 2019

2019 International Symposium on Signals, Circuits and Systems (ISSCS)

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This paper presents the results obtained from 60 GHz propagation measurement campaigns in indoor environments. These measurements are performed in the frequency domain and are based on the use of a vector network analyzer (VNA). The analysis of the results makes it possible to characterize the propagation channel. In first measurement campaign, we show the influence of different types of antennas on the path loss characteristics in a hallway, while in the second campaign results highlight the effect of the type of antenna of the access point (AP) and its position on the angular impulse response of the channel inside a meeting room. All of these results are intended to lead to rules for the deployment of wireless high-speed local and personal area networks (WLANs/WPANs).

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“…In all of mentioned applications, human body plays an important role. Human body blockage (HBB) and human body shadowing (HBS) in wireless communications [10][11][12][13]; concealed weapon detection (CWD) and detection of contraband objects on the surface of human body; and detection of human body presence and movement in buildings by radar systems [2][3][4][5][6][7] confirm this claim.…”

Section: Introductionmentioning

confidence: 99%

Scattering analysis of human body modeled by NURBS surfaces in MM-wave band

Mokhtari-Koushyar

Shishegar

2014

2014 Third Conference on Millimeter-Wave and Terahertz Technologies (MMWATT)

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In this paper, we propose a frequency-independent method for calculation of scattered electromagnetic (EM) fields by the human body in millimeter-wave (MMW) band. The surface of the body is accurately modeled by non-uniform rational B-spline (NURBS) surfaces and is illuminated by a plane wave. The scattered EM fields are formulated by physical optics (PO) approximation. This approximation yields PO surface highly oscillatory integrals that are solved by numerical steepest descent path (NSDP) method, frequency-independently. This paper provides an efficient and accurate method for considering human body in indoor propagation, surveillance and medical imaging, and detection of human body by radiometry.

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The effect of human body on indoor radio wave propagation at 57–64 GHz

Cited by 10 publications

References 4 publications

Angular Measurements and Analysis of the Indoor Propagation Channel at 60 GHz

Angular Measurements and Analysis of the Indoor Propagation Channel at 60 GHz

Millimeter-Wave Propagation Measurements at 60 GHz in Indoor Environments

Scattering analysis of human body modeled by NURBS surfaces in MM-wave band

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