Methods to Evaluate and Mitigate the Interference from Maritime ESIM to Other Services in 27.5-29.5 GHz Band

Zhang

Wireless Communications and Mobile Computing

2022

With the rapid development of radio and computer technologies, the application scenarios of UAV carrying computer flight control systems are becoming more and more abundant. UAV can form a collaborative network with ground IoV (Internet of Vehicle) to improve the link quality of vehicle signals in some environments with poor network connectivity. For UAV and ground vehicles that are far apart, satellites can assist in the transmission of data between them. UAVs are allowed to be included in the satellite communication network in the Ka band in the 2015 World Radiocommunication Conference. In order to avoid the interference with existing communication services in the Ka band, it is necessary to limit the flying height of the UAV. This article will study the frequency compatibility between UAV and Internet of Vehicles in the same-frequency band. First, model the propagation environment of the UAV transmitting signal is modeled and the path loss of it is calculated, including the basic transmission loss in free space of the signal and the atmospheric propagation loss when the signal passes through the atmosphere. Then the radiation pattern of the receiving antenna is modeled, which is a 4 × 2 antenna array in this article, and the total antenna gain is obtained by adding the element gain and the array gain. Finally, the interference between UAV and Internet of Vehicles is simulated, calculating the interference and noise ratio of UAV to the Internet of Vehicles under different pointing angles between the interference and the interfered antenna and different elevation angles from UAV to the GSO satellite. Finally, the safe separation distance to protect the Internet of Vehicles from interference is got.

Section: Methodsmentioning

confidence: 99%

Downlink Cofrequency Interference Analysis of Vehicles and UAV Network in Ka Band

Zhang

Wireless Communications and Mobile Computing

2022

“…In [9], the frequency dependent rejection (FDR) parameter was used to interference management in the 5G communication network. In [1], the dynamic power control method is used to prevent the interference of the M-ESIM. In this method, the changes in the transition power of the M-ESIM depend on the amount of off-axis angle as well as the distance of the M-ESIM from the shore.…”

Section: Introductionmentioning

confidence: 99%

“…One of the important and growing technologies in the satellite communications is providing broadband Fixed Satellite Services to the Earth Station in Motion (ESIM) such as ships, aircraft and trains. These types of moving stations are Land-ESIM (L-ESIM), Maritime-ESIM (M-ESIM) and Aeronautical-ESIM (A-ESIM) [1]. The increasing demand for these services has led to the issue being discussed at ITU international meetings in 2015, 2019 and its continuation in 2023.…”

Section: Introductionmentioning

confidence: 99%

FDR Adjustment for Achieving Desired Minimum Distance of Marine ESIM from the Shore

Doost

Hajipour

Shahidzadeh

2022

Preprint

Determining and observing the minimum allowable distance of the marine earth station in motion (M-ESIM) from the shore prevents its destructive interference on the co-frequency shore fixed station. These earth stations are providing broadband Fixed Satellite Services (FSS). This paper studies the parameters involved in the minimum allowable distance of the ship from the shore by simulating the interference from an M-ESIM on a shore fixed station. This distance is determined versus the latitude, carrier frequency and the annual number of crossings ships along the shore. The results show that with decreasing the carrier frequency, decreasing latitude or increasing the number of annual passing vessels, this minimum distance increases. A solution to eliminate these effects and keep constant the minimum distance is shifting the transmitter frequency band. This frequency shift increases the frequency dependent rejection (FDR). In this paper, values of FDR are obtained separately versus three variables of latitude, carrier frequency, and the number of passing ships so that the minimum allowable distance of the M-ESIM from the shore will remain a constant value. The minimum distance of 100, 105 and 110 Km is evaluated in this paper. In this way, the M-ESIM can be close to the shore as near as desired distance using the FDR adjustment.

“…One of the important and growing technologies in the satellite communications is providing broadband Fixed Satellite Services to the Earth Station in Motion (ESIM) such as ships, aircrafts and trains. These types  Corresponding Author of moving stations are Maritime-ESIM (M-ESIM), Aeronautical-ESIM (A-ESIM) and Land-ESIM (L-ESIM) [1]. The increasing demand for these services has led to the issue being discussed at ITU international meetings in 2015, 2019 and its continuation in 2023.…”

Section: Introductionmentioning

confidence: 99%

“…In [9], the frequency dependent rejection (FDR) parameter was used to interference management in the 5G communication network. In [1], the dynamic power control method is used to prevent the interference of the M-ESIM. In this method, the changes in the transmitted power of the M-ESIM depend on the amount of the off-axis angle as well as the distance of the M-ESIM from the shore.…”

Section: Introductionmentioning

confidence: 99%

A Graph-Based Content Similarity Approach for User Recommendation in Telegram

Karimpour¹,

Chahooki²,

Hashemi³

2021

IJICTR

Determining and observing the minimum allowable distance of the marine earth station in motion (M-ESIM) from the shore prevents its destructive interference on the co-frequency shore fixed station. ESIMs are providing broadband Fixed Satellite Services (FSS). This paper studies the parameters involved in determining the minimum allowable distance of the ship from the shore by the interference simulation. The results show that with decreasing the carrier frequency, decreasing latitude or increasing the number of annual passing vessels, this minimum distance increases. In this paper a methodology is presented and simulated to keep constant the minimum allowed distance by adjusting the values of the frequency dependent rejection (FDR). FDR is caused by shifting the M-ESIM frequency band. The minimum distance of 100, 105 and 110Km is evaluated in this paper. In this way, the M-ESIM can be close to the shore as near as the desired distance using the FDR adjustment.