A statistical ultra-wideband indoor channel model and the effects of antenna directivity on path loss and multipath propagation

Dabin, Jason A.; Haimovich, Alexander M.; Grebel, Haim

doi:10.1109/jsac.2005.863824

Cited by 46 publications

(20 citation statements)

References 11 publications

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“…Figure 5(b) shows the PDS for different antenna beamwidths. It is found that the delay dispersion is significantly reduced when the receive antenna becomes more directive, which is comparable to the observations made in [5][6][7]. In order to establish the validity of the proposed model, we further compare the theoretical delay spreads to the experimental and simulated data in [6].…”

Section: Numerical Examplessupporting

confidence: 72%

“…It is commonly known that delay dispersion due to multipath propagation results in significant channel degradation. Furthermore, narrow beam antennas could be used to eliminate multipath, thereby allowing for the application of simple unequalized modulation schemes [4][5][6][7]. The advancement of smart antenna technology for space diversity has also motivated researchers to investigate the propagation phenomena in the space domain [8].…”

Section: Introductionmentioning

confidence: 99%

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Geometrically Based Channel Model for Indoor Radio Propagation With Directional Antennas

Chen

Zhang²,

Qin³

2010

PIER B

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Abstract-A geometrically based channel model is proposed to describe radio propagation in an indoor environment with directional antennas.In conventional geometric channel models (GCMs), distribution of scatterers does not take into account the antenna properties. A different approach is taken here for directional channel modeling. The locations of scattering objects are defined using nonCartesian coordinates comprising an auxiliary geometric parameter ρ and angle-of-arrival (AOA) φ. Subsequently, we present a systematic method to study the influence of antenna pattern on scatterer distribution by applying two heuristic rules, which underpin the connection between the physical wave-propagation process and its canonical GCM. Provided with model preliminaries, important channel parameters including power azimuthal spectrum (PAS), power delay spectrum (PDS), mean effective gain (MEG), and antenna-decoupled PAS are derived and compared against the published data in the existing literature to demonstrate the usefulness of the proposed model.

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Section: Numerical Examplessupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Geometrically Based Channel Model for Indoor Radio Propagation With Directional Antennas

Chen

Zhang²,

Qin³

2010

PIER B

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“…This gives an additional, rather homogeneous contribution to the free-space received power, which lowers the PL exponent. The same explanation was given in [12], where PL exponents of 1.5 to 1.7 were reported for a class room. Also in [9], PL exponents of 1.3 to 1.7 were found in factory buildings for wood and metal processing (in line-of-sight condition) and attributed to multipath propagation.…”

Section: B Path Loss Model: Results and Discussionmentioning

confidence: 55%

Path loss model and prediction of range, power and throughput for 802.11n in large conference rooms

Heereman

Joseph

Tanghe

et al. 2012

AEU - International Journal of Electronics and Communications

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In this paper, a path loss (PL) model for IEEE 802.11n in large conference rooms is proposed. The PL can be described accurately by a one-slope model with PL exponents varying from 1.2 to 1.7. The influence of humans (during a meeting) on the PL model is investigated. It was found that the PL exponent increases towards 2 in the presence of humans. Further, the effect of frequency (2.4/5 GHz), antenna configuration (SISO vs MIMO 2×2), bandwidth (20 vs 40 MHz) and transmit power on the required number of access points for wireless conferencing, total radiated power consumption and maximum throughput is investigated. This is done by link budget calculation, based on our proposed PL model as well as the IEEE 802.11 TGn channel model. In this evaluation, it was found that the two PL models predict some essentially different effects concerning throughput and radiated power.

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“…According to [13], the second selection would have less path loss than the first selection, therefore resulting in better throughput performance. However, from Fig.…”

Section: A Outdoor Test In Open Environmentsmentioning

confidence: 99%

Design of a networked robotic system capable of enhancing wireless communication capabilities

Min

Matson

Khaday

2013

2013 IEEE International Symposium on Safety, Security, and Rescue Robotics (SSRR)

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In this paper, we present the design of a networked robotic system capable of enhancing wireless communication capabilities. The core of the system is active antenna tracking with directional antennas. The proposed system is decentralized and consists mainly of a mobile robot system and a command center system. Each system is equipped with off-theshelf network devices such as antennas, access points (AP), and network switches. For directional antennas to be beneficial to our system, we propose a weighted centroid algorithm (WCA), which is a method for active antenna tracking and direction of arrival (DOA) estimation. Through extensive field experiments in different environments and with different antenna selections, such as omni-to-omni, omni-to-directional, directional-to-directional antennas, we demonstrate the feasibility of our proposed system. We expect that our system can be applied in a variety of rescue, surveillance, and emergency scenarios where high bandwidth and long distance communications are needed.

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A statistical ultra-wideband indoor channel model and the effects of antenna directivity on path loss and multipath propagation

Cited by 46 publications

References 11 publications

Geometrically Based Channel Model for Indoor Radio Propagation With Directional Antennas

Geometrically Based Channel Model for Indoor Radio Propagation With Directional Antennas

Path loss model and prediction of range, power and throughput for 802.11n in large conference rooms

Design of a networked robotic system capable of enhancing wireless communication capabilities

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