Helicopter Radio Altimeter Interference Path Loss Measurement Including Adjacent 5G Mobile Telecommunications Band

Futatsumori, Shunichi; Miyazaki, Norihiko; Hiraga, Noriaki; Kobayashi, Keiji; Nakafukushima, Kenichi

doi:10.1109/apmc52720.2021.9662023

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…The 5G helicopter medical rescue had a faster response, high-level accuracy, and better patient transport capacity compared with the traditional non-5G helicopter medical rescue and ambulance traditional rescue [15] . We conducted a comparative analysis and research on the clinical effects of these three different types of medical rescue methods, and also conducted comparative research on key technologies domestically and internationally, which are internationally leading technologies, to provide advanced scientific and effective decision-making basis for future medical rescue operations.…”

Section: Resultsmentioning

confidence: 99%

Exploring 5G Key Technologies for Helicopter Aviation Medical Rescue

Han

Chen

et al. 2023

Preprint

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Purpose: This study aimed to explore the application of 5G key technologies in helicopter aviation medical rescue. Methods: This study used retrospective analysis to statistically analyze 11 aviation medical rescue cases at the Shenzhen University General Hospital from November 2019 to March 2023. To assess the time and efficiency of the rescue, we paid attention to the data such as flight time, distance, disease types, and rescue scenarios. The application of 5G low-altitude network communication technology, body area network disease sensing technology and 5G air-ground collaborative rapid diagnosis and treatment technology in aeromanical rescue was contrasted and explored. Results: The helicopter rescue flight distance was 60–600 kilometers, and the flight time was 10–136 min. The study used a 5G private network and 5G module vital sign monitoring equipment. The low-altitude 5G network had high communication quality and high-precision localization by the domestically produced Beidou. The air body area network technology used multi-pose mannequins, depth learning estimation algorithm, and encryption algorithm information entropy 7.9993. The encryption time was short. The 5G air-to-ground collaborative rapid diagnosis and treatment technology supported 5G direct connection, with a packet loss rate of 0.2%, and achieved 1080P high-definition multi-party remote consultation. Conclusions: The combination of helicopter rescue and 5G technology could significantly improve rescue efficiency, shorten response time, and achieve a remote diagnosis. The quality of low-altitude 5G network communication was high, and the domestic Beidou satellite high-precision positioning technology supported precise rescue. The airborne body area network disease perception technology adopted advanced human channel models and encryption algorithms to ensure timely and secure information. The 5G air-to-ground collaborative rapid diagnosis and treatment technology enabled high-quality remote consultation. Applying these innovative technologies might significantly enhance the ability of emergency medical rescue and provide strong support for future rescue operations.

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Section: Resultsmentioning

confidence: 99%

Exploring 5G Key Technologies for Helicopter Aviation Medical Rescue

Han

Chen

et al. 2023

Preprint

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“…PL i , L cable , L polar,i , and L body,i are the path loss, cable loss, polarization loss, and body loss, respectively. The radius of the coverage area is expressed as follows [15].…”

Section: Interference Power Calculationmentioning

confidence: 99%

“…However, the indepth description was not included in these studies such as antenna types and the loss models without any interference reduction methods. S. Futatsumori et al developed a measurement method for the interference path loss at the RA and discussed the possibilities of the spectrum sharing between the wireless avionics intra-communication (WAIC) systems and the RAs [14], [15]. In [16], the interference of 5G signals ranging from 0 to 1,500 ft was evaluated with the criteria of pulsed RA in 5G systems, which describes that the interference power threshold decreases as the altitude increases.…”

Section: Introductionmentioning

confidence: 99%

Coexistence of 5G Communication Systems With Radar Altimeters

Li,

Liu,

et al. 2024

IEEE Access

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With the growing demand for 5G, many countries have allocated additional spectrum above 3.7 GHz, potentially causing serious interference to radar altimeters operating at the 4.2-4.4 GHz band. Therefore, in this paper, a general mathematical model is proposed to estimate interference from 5G base stations to a radar altimeter which can be applied for aircraft, helicopters, unmanned aerial vehicles, satellites, and hot-air balloons. Using this model, the interference at the radar altimeter is evaluated in several environments such as rural, suburban, and urban. Two types of antennas are considered which are omnidirectional and multiple-input and multiple-output antennas (4-by-4, 8-by-8, and 16-by-16). Additionally, a power control-aided distance protection method is introduced to enable the coexistence of the 5G base stations and the radar altimeters. To validate the effectiveness of the proposed protection method, the Monte Carlo method is employed. Numerical results present the heights of the radar altimeter where the interference-to-noise ratio becomes higher than the interference protection threshold of -6 dB. In addition, it shows that the radar altimeter can coexist with the 5G base stations with the proposed protection scheme.

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5G interference with aviation altimeters: technology and policy recommendations for coexistence

Bukhari,

Mérida

2024

Transport Policy

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Helicopter Radio Altimeter Interference Path Loss Measurement Including Adjacent 5G Mobile Telecommunications Band

Cited by 8 publications

References 2 publications

Exploring 5G Key Technologies for Helicopter Aviation Medical Rescue

Exploring 5G Key Technologies for Helicopter Aviation Medical Rescue

Coexistence of 5G Communication Systems With Radar Altimeters

5G interference with aviation altimeters: technology and policy recommendations for coexistence

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