Integrated Wi-Fi and LoRa network on UAVs for localizing people during SAR operations

Calabrò, Antonello; Giuliano, Romeo

doi:10.23919/aeitautomotive52815.2021.9662760

Cited by 9 publications

(10 citation statements)

References 23 publications

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“…Variable body shadowing contributes to increasing σ SF above the benchmark values. The average RSE, calculated for the new model according to (7), is lower than 4.7%, and the statistical validity of the model is thereof proven.…”

Section: B Large-scale Fadingmentioning

confidence: 78%

“…LoRa is a convenient low-power wide-area network protocol that can enable kilometric communications by low transmission power [1]- [3]. It is hence extremely promising for fostering search and rescue (SaR) missions [4] that usually take place in harsh environments like mountains [5], disaster areas [6], and forests [7]. Forested areas, in particular, are challenging scenarios for LoRa devices due to the detrimental effects of vegetation on path loss (PL) [8], [9].…”

Section: Introductionmentioning

confidence: 99%

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Body-UAV Near-Ground LoRa Links Through a Mediterranean Forest

Bianco

Marrocco

2023

IEEE Trans. Antennas Propagat.

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LoRa low-power wide-area network protocol has recently gained attention for deploying ad-hoc search and rescue (SaR) systems. They could be empowered by exploiting body-UAV links that enable communications between a body-worn radio and a UAV-mounted one. However, to employ UAVs effectively, knowledge of the signal's propagation in the environment is required. Otherwise, communications and localization could be hindered. The radio range, the packet delivery ratio (PDR), and the large-and small-scale fading of body-UAV LoRa links at 868 MHz when the radio wearer is in a Mediterranean forest are here characterized for the first time with a near-ground UAV having a maximum flying height of 30 m. A log-distance model accounting for the body shadowing and the wearer's movements is derived. Over the full LoRa radio range of about 600 m, the new model predicts the path loss (PL) better than the stateof-the-art ones, with a reduction of the median error even by ∼ 10 dB. The observed small-scale fading is severe and follows a Nakagami-m distribution. Extensions of the model for similar scenarios can be drawn through appropriate corrective factors.

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Section: B Large-scale Fadingmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Body-UAV Near-Ground LoRa Links Through a Mediterranean Forest

Bianco

Marrocco

2023

IEEE Trans. Antennas Propagat.

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“…For the simulation, the angle has three values: 𝜃 ̂, 𝜃 ̂+ 𝜎 𝜃 0 , and 𝜃 ̂− 𝜎 𝜃 0 to reasonably cover the sample space for the angle. Therefore, 3 4 = 81 points are used for the simulation and 81 estimated points {(xj, yj)| j = 1, …, 81} are calculated.…”

Section: Confidence Range Using a Pseudo Monte Carlo Methodsmentioning

confidence: 99%

“…Typical mountain SaR operations require the localization of the persons involved in accidents in harsh environments. The climber location information systems have been setup in case of distress accidents at the mountainous area, which involves VHF radio wave stations in mountain lodges [2,3] or drones with WiFi beacons receiver [4]. Location awareness rescue system (LARS) for monitoring rescuers is deployed for informing the mission coordinator in mountain rescue teams via GPRS or WiFi connectivity [5] and even CNN is employed to facilitate SaR from the images taken from drones [6].…”

Section: Introductionmentioning

confidence: 99%

Positioning for Search and Rescue in GPS-Denied Area by Distributed WiFi RSS-Based DoA Modules

Huang

2022

IEEE Access

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Environmental factors affect the Received Signal Strength (RSS) so the received data exhibit random propagation characteristics, such as fading and shadowing effects. This study proposes a Direction of Arrival (DoA) module for the Search and Rescue (SaR) or anti-drone applications, which uses patch antennas and a rat-race coupler as the receivers. An angular estimation is presented for WiFi positioning, using optimally placed DoA antennas and a pseudo-inverse algorithm. The experiment is performed in a university campus with the device under test (DUT) as the transmitter. Using four DoA antennas as receivers at the corners of a 100m×100m region, the mean positioning deviation is about 2m, which is 2% of the region. The confidence range for the estimated positions is also calculated.

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“…В связи с тем, что группа БпЛА, выполняющая задание, является открытой системой, взаимодействующей со стохастической средой с возмущениями, возможно возникновение незапланированных и кризисных ситуаций [12][13][14][15][16]. В общем случае под кризисными ситуациями понимаются случаи, когда режим автономного управления невозможно реализовать в полном объеме.…”

Section: Uav Group Management When Working Out Of Crisis Flight Situa...unclassified

Uav Group Management When Working Out of Crisis Flight Situations in Solving Transport Problems

Savelyev¹,

Lebedeva²,

Lebedev³

et al. 2022

IZVESTIYA SFedU. ENGINEERING SCIENCES

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Integrated Wi-Fi and LoRa network on UAVs for localizing people during SAR operations

Cited by 9 publications

References 23 publications

Body-UAV Near-Ground LoRa Links Through a Mediterranean Forest

Body-UAV Near-Ground LoRa Links Through a Mediterranean Forest

Positioning for Search and Rescue in GPS-Denied Area by Distributed WiFi RSS-Based DoA Modules

Uav Group Management When Working Out of Crisis Flight Situations in Solving Transport Problems

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