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Low earth orbit satellite space-ground communication channel modeling model and modeling method

A low-orbit satellite and communication channel technology, applied in transmission monitoring, radio transmission systems, electrical components, etc., can solve the problems of inability to accurately simulate the state duration and its statistical characteristics, and achieve the prediction of future long-term channel state Effect

Inactive Publication Date: 2020-05-12
中国星网网络应用有限公司
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Problems solved by technology

Although these three models can basically describe the propagation characteristics of satellite channels approximately, they cannot accurately simulate the state duration and its statistical characteristics for complex channels such as low-orbit satellites

Method used

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  • Low earth orbit satellite space-ground communication channel modeling model and modeling method
  • Low earth orbit satellite space-ground communication channel modeling model and modeling method
  • Low earth orbit satellite space-ground communication channel modeling model and modeling method

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Embodiment Construction

[0042] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] The present invention designs a low-orbit satellite space-to-earth communication channel modeling method. In practical applications, switching between the direct state, the medium shadow state and the deep shadow state can be realized based on the Markov chain process, and at the same time, the transmission time is taken into account. Delay, noise and Doppler frequency deviation and frequency deviation change rate.

[0044] Such as figure 1 As shown, the low-orbit satellite space-ground communication channel model of the present invention mainly includes Doppler frequency shift and its rate of change module, multipath delay and gain module, Rician module, lognormal module, state transition control module and Gauss white noise module, adopts In this model, the modeling method of low-orbit satellite space-ground co...

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Abstract

The invention discloses a low earth orbit satellite space-ground communication channel modeling model and modeling method. The model comprises a Doppler frequency shift and change rate module, a multipath delay and gain module, a Rician module, a lognormal module, a state transition control module and a Gauss white noise module. According to the invention, based on the Markov chain process, switching among a direct irradiation state, a medium shadow state and a depth shadow state can be realized; and the transmission time delay, the noise, the large Doppler frequency offset and the frequency offset change rate are considered at the same time, so that not only can stationary and non-stationary orbit satellite communication channel characteristics be described, but also broadband and narrowband communication conditions can be described, and the transmission characteristics of a low-orbit satellite mobile communication channel can be described more accurately.

Description

technical field [0001] The invention belongs to the technical field of 6G mobile communication, and in particular relates to a low-orbit satellite space-ground communication channel modeling model and modeling method. Background technique [0002] The characteristics of low orbit satellite mobile communication system, low transmission delay and low terminal requirements have made it a main development direction of satellite communication system. In the low orbit satellite mobile communication system, the signal will be affected by factors such as Doppler effect, shadow effect, multipath effect and propagation noise. Therefore, in the research and development process of the low-orbit satellite mobile communication system, in order to verify the reliability of the system, it is necessary to understand the influence of the low-orbit satellite channel on the system signal. Therefore, in order to better carry out low-orbit satellite signal transmission and improve transmission q...

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Application Information

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IPC IPC(8): H04B17/391H04B7/185
CPCH04B7/18519H04B17/391H04B17/3912
Inventor 王艳峰
Owner 中国星网网络应用有限公司
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