Characterizing Wideband Signal Envelope Fading in Urban Microcells Using the Rice and Nakagami Distributions

Gaertner, G.; Nuallain, Eamonn O.

doi:10.1109/tvt.2007.901857

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…The appropriate averaging interval and sampling rate for an 802.11 signal was shown in [23] to be 5 wavelengths with samples taken at less than 0.5 wavelength intervals. slightly better accuracy in the logarithmic domain [24].…”

Section: Link Quality Predictorsmentioning

confidence: 99%

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Link Quality Prediction for 802.11 MANETs in Urban Microcells

Gaertner¹,

Nuallain²

2016

JCC

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In this paper we derive the optimal link quality predictor (LQPR) whose parameters are estimated from signal power and node speed samples. We propose a fast estimator for these parameters whose computational complexity is three orders lower than that of the optimal estimator with only a slight loss in accuracy thus enabling realtime execution. We show that using the most recent local mean of the signal as a predictor of future signal strength is also a very close approximation to the optimal predictor. This is the central result of this paper. It obviates the need for complex and/or computationally intensive link quality predictors for 802.11 in urban microcells and has the advantage of not requiring node speed information. The LQPRs are evaluated against the lower error bound. We show that the LQPR based on the most recent local mean of the signal predicts the packet reception probability for pedestrians in urban microcells on average with a mean absolute error of 13.47%, 16.54%, 18.21% and 19.38% for 1 s, 2 s, 3 s and 4 s into the future respectively. This LQP accuracy resembles closely the lower error bound with, for example, a difference of only 2.47% at 2 s into the future.

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Section: Link Quality Predictorsmentioning

confidence: 99%

“…is a function that maps the parameters max , a L ∆ to generate the appropriate Ricean K-factor for a wideband signal [23].…”

Section: Augmenting the Ns Simulatormentioning

confidence: 99%

Link Quality Prediction for 802.11 MANETs in Urban Microcells

Gaertner¹,

Nuallain²

2016

JCC

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“…The problem of the propagation channel dependence on system bandwidth, hence, of the fading margins that need to be considered, was already addressed in the past [8], [9], [10], [11], [12]. Still, as far as the authors are aware of, no such studies exist for BANs in indoor circular metallic environments.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Dependence of the Propagation Channel in Circular Metallic BAN Environments

Ferreira¹,

Cardoso²,

Ambroziak

et al. 2023

IEEE Access

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In this paper, the bandwidth dependence of the propagation channel for Body Area Networks (BANs) in circular metallic environments is addressed and models are proposed to evaluate the appropriate short-term fading margins that should be considered as a function of the system bandwidth. The deployment of BANs in metallic indoor environments, such as ships, factories, warehouses and other similar environments, involves additional challenges compared to other indoor environments due to the specific propagation effects in this type of environments (i.e., with strong reflections). No studies of this kind and for this type of environment can be found in literature, giving the motivation for this work. Bandwidth dependent values of delay spread are also presented and discussed. It is observed that for a system bandwidth up to 100 MHz the fading depth is composed of three main stages, with the transitions between these stages being associated with the system ability to discriminate arriving rays at the receiver. Average values of fading depth are 16.4, 13.2 and 11.0 dB for stages 1, 2 and 3, respectively, the difference between consecutive stages ranging between 2.2 to 3.2 dB. For a system bandwidth larger than 100 MHz, the fading depth decreases with an increasing system bandwidth, with an average decay rate close to 3 dB per 100 MHz bandwidth, being about 2 dB for system bandwidths above 400 MHz.INDEX TERMS Body area networks, metallic structures, propagation channel, fading-depth, short-term fading margin, bandwidth dependence.

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2013

Wireless Communications

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Characterizing Wideband Signal Envelope Fading in Urban Microcells Using the Rice and Nakagami Distributions

Cited by 8 publications

References 29 publications

Link Quality Prediction for 802.11 MANETs in Urban Microcells

Link Quality Prediction for 802.11 MANETs in Urban Microcells

Bandwidth Dependence of the Propagation Channel in Circular Metallic BAN Environments

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