Optimization Method of OFDM Shared Signal Frequency Resource Based on Complexity of Electromagnetic Environment

Zhu, Shengkun; Yang, Ruijuan; Zuo, Jiajun; Li, Dongjin

doi:10.1109/itca49981.2019.00025

“…The frequency-domain characteristics represent the overall state of the spectrum occupied by the spacecraft's electromagnetic environment, usually expressed by parameters such as frequency occupancy. Frequency occupancy is the ratio of the frequency band occupied by the signal power density spectrum of the electromagnetic environment in a certain space and time interval that exceeds the specified environmental level threshold of the frequency range of Device A, which reflects the amount of the electromagnetic spectrum's resources that are occupied by the space's electromagnetic radiation [24,25]. According to Equation ( 4), in a certain space of V Ω and time range of [t 1 ,t 2 ], the average power spectrum of the signal at different frequencies can be expressed using Equation (10), where double integration is used to integrate over time and space.…”

Section: Analysis and Modelling Of The Frequency-domain Characteristics Of Electromagnetic Radiationmentioning

confidence: 99%

Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

Cui

¹

,

Jian

²

,

Kong

³

et al. 2021

Sensors

View full text Add to dashboard Cite

During the launch and return of a spacecraft, the intense combustion of propellants generates strong electromagnetic radiation, which interferes with the operation of electronic equipment in the spacecraft. To improve the electromagnetic compatibility of electronic equipment in spacecraft, it is necessary to study the electromagnetic radiation characteristics of rocket fuel. An electromagnetic radiation measurement system based on antennas is designed to measure the electromagnetic radiation generated by rocket fuel, and the electromagnetic radiation characteristics are obtained through data analysis. The mechanism of the electromagnetic radiation generated by rocket fuel is comprehensively analysed through the spatial, time-domain, frequency-domain, and energy-domain characteristics. A characterization model is established to provide a reliable scheme for evaluating the influence of rocket fuel electromagnetic radiation on electronic equipment in spacecraft.

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“…The time-domain threat degree of an electromagnetic environment to Device A is expressed by the ratio between the period when the average power density spectrum of the electromagnetic environment threshold to the working period of Device A. According to Equation ( 2), the time-domain threat degree of Device A is: electromagnetic radiation [27,28]. According to Equation (4), in a certain space of VΩ and time range of [t1,t2], the average power spectrum of the signal at different frequencies can be expressed using Equation (10), where the double integration is used to integrate over time and space.…”

Section: Analysis and Modelling Of The Time-domain Characteristics Of The Electromagnetic Environmentmentioning

confidence: 99%

Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

Cui¹,

Kong²,

Jiang³

et al. 2021

Preprint

View full text Add to dashboard Cite

During the launch and return of a spacecraft, the intense combustion of propellants generates strong electromagnetic radiation, which interferes with the operation of electronic equipment in the spacecraft. To improve the electromagnetic compatibility of electronic equipment in spacecraft, it is necessary to study the electromagnetic radiation characteristics of rocket fuel. An electromagnetic radiation measurement system based on antennas is designed to measure the electromagnetic radiation generated by rocket fuel, and the electromagnetic radiation characteristics are obtained through data analysis. The mechanism of the electromagnetic radiation generated by rocket fuel is comprehensively analysed through the spatial, time-domain, frequency-domain, and energy-domain characteristics. A characterization model is established to provide a reliable scheme for evaluating the influence of rocket fuel electromagnetic radiation on electronic equipment in spacecraft.

show abstract

“…The frequency-domain characteristics represent the overall state of the spectrum occupied by the spacecraft's electromagnetic environment, usually expressed by parameters such as frequency occupancy. Frequency occupancy is the ratio of the frequency band occupied by the signal power density spectrum of the electromagnetic environment in a certain space and time interval that exceeds the specified environmental level threshold to the frequency range of Device A, which reflects the situation of how much of the electromagnetic spectrum resources are occupied by the space's electromagnetic radiation 27,28 . According to Equation 4, in a certain space of VΩ and time range of [t1,t2], the average power spectrum of the signal at different frequencies can be expressed using Equation 10, where the double integration is used to integrate over time and space.…”

Section: Analysis and Modelling Of The Frequency-domain Characteristi...mentioning

confidence: 99%

Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

Cui

¹

,

Kong

²

,

Jian

³

et al. 2021

Preprint

1

0

View full text Add to dashboard Cite

During the launch and return of a spacecraft, the intense combustion of propellants generates strong electromagnetic radiation, which interferes with the operation of electronic equipment in the spacecraft. To improve the electromagnetic compatibility of electronic equipment in spacecraft, it is necessary to study the electromagnetic radiation characteristics of rocket fuel. An electromagnetic radiation measurement system based on antennas is designed to measure the electromagnetic radiation generated by rocket fuel, and the electromagnetic radiation characteristics are obtained through data analysis. The mechanism of the electromagnetic radiation generated by rocket fuel is comprehensively analysed through the spatial, time-domain, frequency-domain, and energy-domain characteristics. A characterization model is established to provide a reliable scheme for evaluating the influence of rocket fuel electromagnetic radiation on electronic equipment in spacecraft.

show abstract

Optimization Method of OFDM Shared Signal Frequency Resource Based on Complexity of Electromagnetic Environment

Cited by 3 publications

References 5 publications

Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

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