Airport surface area propagation path loss in the VHF band

The 433 MHz band is gaining relevance as an alternative to the 2.4 GHz band for machine-to-machine communications using low-power wireless technologies. Currently, two standards are being developed that use the 433 MHz band, DASH7 Mode 2 and IEEE 802.15.4f. The article presents propagation models based on measurements conducted at the 433 MHz and 2.4 GHz bands that can be used for link budget calculations in both outdoor and indoor environments depending on node height. The results obtained show that the 433 MHz band has a larger communication range in both indoor and outdoor environments despite the negative effects of having a larger Fresnel zone. In addition, indoor propagation measurements are conducted in line-of-sight and nonline-of-sight conditions to determine the suitability of channel hopping to combat the effects of multipath propagation. Contrary to the 2.4 GHz band, the results show that channel hopping at 433 MHz does not provide any link robustness advantage because the channel coherence bandwidth is larger than the whole band bandwidth, and thus, all channels are highly correlated.

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“…Other interesting articles related to propagation aspects at the 433 MHz and the 2.4 GHz bands in different environments include .…”

Section: Related Workmentioning

confidence: 99%

On the suitability of the 433 MHz band for M2M low‐power wireless communications: propagation aspects

Tuset-Peiró

Angles-Vazquez

López-Vicario

et al. 2013

Trans. Emerging Tel. Tech.

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“…According to [31], α can have values up to 6 for outdoor transmitters and can be greater for indoor antennas based on the number of penetrated floors. Also, in [33], research on the path loss exponent for ground-to-air communication in airports shows path loss exponents of up to 4 for LoS wireless links, and up to 5.4 for Non-LoS links in the Very High Frequency (VHF) band.…”

Section: A Earth-space Path Loss Modelmentioning

confidence: 99%

Opportunistic Temporal Spectrum Coexistence of Passive Radiometry and Active Wireless Networks

Koosha

Mastronarde

2022

2022 IEEE Western New York Image and Signal Processing Workshop (WNYISPW)

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The rapid growth of wireless technologies has fostered research on spectrum coexistence worldwide. One idea that is gaining attention is using frequency bands solely devoted to passive applications, such as passive remote sensing. One such option is the 27 MHz L-band spectrum from 1.400 GHz to 1.427 GHz. Active wireless transmissions are prohibited in this passive band due to radio regulations aimed at preventing Radio Frequency Interference (RFI) on highly sensitive passive radiometry instruments. The Soil Moisture Active Passive (SMAP) satellite, launched by the National Aeronautics and Space Administration (NASA), is a recent space-based remote sensing mission that passively scans the Earth's electromagnetic emissions in this 27 MHz band to assess soil moisture on a global scale periodically. This paper evaluates using the restricted L-band for active terrestrial wireless communications through two means. First, we investigate an opportunistic temporal use of this passive band within a terrestrial wireless network, such as a cluster of cells, during periods when there is no Line of Sight (LoS) between SMAP and the terrestrial network. Second, leveraging stochastic geometry, we assess the feasibility of using this passive band within a large-scale network in LoS of SMAP while ensuring that the error induced on SMAP's measurements due to RFI is below a given threshold. The methodology established here, although based on SMAP's specifications, is adaptable for utilization with various passive sensing satellites regardless of their orbits or operating frequencies.

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“…With this assumption, we let the received SOI powers at AS-2 and GS be equal, i.e., P r 1, G = P r G,2 = Ω and evaluate P H BD out,system under various inter AS separations by assuming d 1,2 = αd G,2 . We further assume f c = 136.725 MHz (VHF) and n = 6 in this work [18], [19]. From (2), it can be easily shown that…”

Section: Analysis Of Outage Probabilitiesmentioning

confidence: 99%

On the Performance Analysis of Hybrid-Duplex Systems for Aeronautical Communications

Ernest

Sirigina

Krishna³

et al. 2018

2018 IEEE 87th Vehicular Technology Conference (VTC Spring)

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Air traffic growth is expected to rise sharply in the near future, causing a swell in data communication demands on the congested aeronautical spectrum which cannot be met with existing aeronautical communication systems. To this end, a hybrid-duplex (HBD) aeronautical communications system consisting of a full-duplex (FD) enabled ground station, and legacy half-duplex (HD) air-stations is proposed as a direct solution to boost spectral efficiency. In particular, the system level outage probabilities and transmission power requirements of the proposed HBD and HD aeronautical communication systems are analyzed. Performance analysis shows that the proposed HBD system can attain better outage performance in the en route scenario. The proposed HBD system is also able to support an equivalent data rate as an HD system with lower transmit power and signal-to-interference-plus-noise-ratio (SINR) requirements and longer transmission range when inter-aircraft interference and residual self-interference is kept sufficiently low.

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Airport surface area propagation path loss in the VHF band

Cited by 7 publications

References 8 publications

On the suitability of the 433 MHz band for M2M low‐power wireless communications: propagation aspects

On the suitability of the 433 MHz band for M2M low‐power wireless communications: propagation aspects

Opportunistic Temporal Spectrum Coexistence of Passive Radiometry and Active Wireless Networks

On the Performance Analysis of Hybrid-Duplex Systems for Aeronautical Communications

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