Near space dynamic plasma sheath channel modeling and simulating method

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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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 plasma on the signal and channel characteristics Insufficient problems, aiming to solve the dynamic plasma channel model modeling problem from the theoretical modeling method and theoretical calculation of channel parameters, and provide guidance for the design of mitigation or adaptive communication technology

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