Near space dynamic plasma sheath channel modeling and simulating method

A plasma sheath and channel modeling technology, which can be used in transmission monitoring, electrical components, transmission systems, etc., to solve problems such as the inability of channel detection, the lack of understanding of the influence of dynamic plasma signals and channel characteristics, etc.

Active Publication Date: 2015-02-25
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a method for modeling and simulating the channel of the dynamic plasma sheath near space, because the current channel detection cannot be realized in the actual flight experiment, and the cognition of the influence of the dynamic pla

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  • Near space dynamic plasma sheath channel modeling and simulating method
  • Near space dynamic plasma sheath channel modeling and simulating method
  • Near space dynamic plasma sheath channel modeling and simulating method

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[0062] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0063] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0064] Such as figure 1 and Figure 13 As shown, the method for modeling and simulating the near-space dynamic plasma sheath channel of the embodiment of the present invention includes the following steps:

[0065] S101: Divide channel resources according to large-scale space-time-frequency features, and construct a large-scale space-time-frequency channel resource matrix; where height corresponds to large-scale airspace features, speed corresponds to large-sca...

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Abstract

The invention discloses a near space dynamic plasma sheath channel modeling and simulating method. The method comprises the steps that channel resources are partitioned according to large-scale space-time-frequency characteristics to construct a large-scale space-time-frequency channel resource matrix, wherein the height corresponds to large-scale space domain characteristics, the speed corresponds to large-scale time domain characteristics, and frequency points correspond to large-scale frequency domain characteristics; for all channel resource matrixes, dynamic small-scale channel parameters are obtained; small-scale channel model simulating is achieved according to given small-scale channel parameters; large-scale channel model simulating is achieved by repeating small-scale channel models at multiple states on a near space flight path. The method is suitable for channel modeling under different dynamic rules, random-amplitude phase probability density distribution which may occurs under a plasma sheath is simulated, and channel modeling feasibility is guaranteed; the method is suitable for near space aircraft plasma sheath channel modeling and spaceflight reentry-return spacecraft plasma sheath channel modeling.

Description

technical field [0001] The invention belongs to the technical field of measurement and control communication, and in particular relates to a method for modeling and simulating a dynamic plasma sheath channel in an adjacent space. Background technique [0002] During the high-speed flight of the hypersonic vehicle in the adjacent space, it will be covered with a layer of high-temperature thermal plasma (plasma sheath), and the charged particles mainly free electrons inside the sheath will absorb, reflect and scatter electromagnetic waves , which produces an effect similar to metal shielding, causing serious attenuation of electromagnetic signals, and at the same time changing the impedance characteristics of the antenna and distorting the pattern. These effects will lead to the deterioration of communication quality, and in severe cases, the communication signal will be interrupted, resulting in blackout phenomenon. The black barrier phenomenon will seriously affect the capt...

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Application Information

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IPC IPC(8): H04B17/391
Inventor 石磊李小平刘彦明周辉姚博方水汛
Owner XIDIAN UNIV
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