Channel Characterization and Finite-State Markov Channel Modeling for Time-Varying Plasma Sheath Surrounding Hypersonic Vehicles

He, Guolong; Zhan, Yafeng; Ge, Ning; Pei, Yukui; Wu, Bin; Zhao, Yuan

doi:10.2528/pier14031104

Cited by 42 publications

(13 citation statements)

References 24 publications

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“…Hence, It is speculated that time-varying plasma makes the constellation rotates. To validate the presumption further, we built a simplified model of one-dimensional EM wave propagation in the time-varying plasma 18 and used the wave impedance method and the equivalent transmission principle to calculate the EM wave transmission in experimental time-varying plamsa [22][23][24] and compared with the experimental results. The simulation parameter (including the electron density and plasma thickness) should be same as the experimental conditions.…”

Section: -6mentioning

confidence: 99%

“…[14][15][16] Some research indicates that even though most of radio wave energy could penetrate plasma sheath, reliable communications cannot be achieved. 17,18 Potter analyzed and calculated the highest electron density fluctuation frequency in the reentry plasma is from 40 kHz to 100 kHz. 14 Guthart,15 Sproul analyzed the influence of the reentry turbulent plasma fluctuation on electromagnetic wave propagation, 16 and pointed out that the amplitude and phase modulation by the turbulent plasma at carrier frequency 44GHz are weaker than those at carrier frequency 5.6GHz.…”

Section: Introductionmentioning

confidence: 99%

“…14 Guthart,15 Sproul analyzed the influence of the reentry turbulent plasma fluctuation on electromagnetic wave propagation, 16 and pointed out that the amplitude and phase modulation by the turbulent plasma at carrier frequency 44GHz are weaker than those at carrier frequency 5.6GHz. He et al 17 assumed a finite-state Markov channel (FSMC) model, to represent the dynamical effects on electromagnetic wave propagation through the plasma sheath. In Ref.…”

Section: Introductionmentioning

confidence: 99%

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Propagation of phase modulation signals in time-varying plasma

Yang

Wang

et al. 2016

AIP Advances

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The effects of time-varying plasma to the propagation of phase modulation signals are investigated in this paper. Through theoretical analysis, the mechanism of the interaction between the time-varying plasma and the phase modulation signal is given. A time-varying plasma generator which could produce arbitrary time-varying plasma is built by adjusting the discharge power. A comparison of results from experiment and simulation prove that the time-varying plasma could cause the special rotation of QPSK (Quadrature Phase Shift Keying) constellation, and the mechanism of constellation point’s rotation is analyzed. Additionally, the experimental results of the QPSK signals’ EVM (Error Vector Magnitude) after time-varying and time-invariant plasma with different ωp/ω are given. This research could be used to improve the TT&C (Tracking Telemeter and Command) system of re-entry vehicles.

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Section: -6mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Propagation of phase modulation signals in time-varying plasma

Yang

Wang

et al. 2016

AIP Advances

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“…Compared with a single random process, a multistate Markov chain might be able to describe the dynamic time-varying plasma sheath channel for reentry vehicles with relatively high precision. He et al [7], [23] focused on this problem and proposed a finite-state Markov channel (FSMC) model to determine the dynamic effects of plasma sheath on EM wave propagation after an amplitude fluctuation induced by electron density turbulence in a plasma [24]. In the FSMC model, the power levels of the received signal are manually partitioned into a finite number of states, and an equal probability division criterion is used to establish a Markov channel model with eight states.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Multistate Markov Channel Modeling Method for Reentry Dynamic Plasma Sheaths

Shi

Liu

Fang

et al. 2016

IEEE Trans. Plasma Sci.

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Channel modeling of a plasma sheath for hypersonic reentry vehicles is important in addressing reentry communication blackout issues. Given that the time-varying property of the transmission medium is caused by physical factors such as largescale flight conditions variation, especially angle of attack, and small-scale fluid turbulence, a new adaptive multistate Markov channel modeling method is proposed to present the dynamic effects of reentry plasma sheaths on wireless channels. First, a quasi-Gaussian function mathematical model for the electron density of a dynamic plasma sheath is established according to the variation frequency of the dynamic physical factors. Then, the time-varying attenuation is calculated by combining the quasi-static Monte Carlo and uniform hierarchical analytical methods for nonuniform electronic density distribution. Finally, a hidden Markov model is employed to model the channel characteristics of the dynamic plasma sheath, and a reversiblejump Markov chain Monte Carlo algorithm is used to adaptively estimate the channel parameters of the multistate Markov channel. Simulation results show that the first-order statistical properties of the proposed channel are in good agreement with the calculated variable attenuation of radio waves, and this method has the adaptive capacity to estimate the number of multiple states and the channel parameters in each state without a need for manual setting. IndexTerms-Dynamic plasma sheath, Markov channel, reversible-jump Markov chain Monte Carlo algorithm (RJ-MCMC).

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“…Similarly, the plasma sheath enveloping a reentry vehicle can result in "communications blackout" during which the performance of on-board electromagnetic systems experience significant degradation [7,8]. One of the main cause of the "blackout" problem is the failure of on-board antennas which are greatly affected by the reentry plasma sheath [9,10]. Despite of the fact that the electromagnetic scattering from coated objects has been investigated extensively in past, the study of scattering from plasma coated objects has become very popular in recent years due to its practical applications in RCS reduction (stealth technology), radar camouflage, minimization of scattering by antenna obstacles, development of echo area enhancement devices and many other potential applications [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Study of the Effects of Eccentric Plasma Coating Over Metamaterial Cylinder

Malik¹,

Ahmed²,

Syed³

et al. 2015

PIER M

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Abstract-A plasma sheath can significantly alter the electromagnetic properties of an object, which leads to many practical applications. In this article, the electromagnetic scattering properties of a DB metamaterial cylinder coated with unmagnetized plasma are presented. The effects of layer thickness, non-uniform cladding (eccentric coating), electron number density, electron-neutral collision frequency and the frequency of incident wave on radar cross-section (RCS) of the object are discussed. It is found that the RCS of the DB metamaterial objects can be reduced or enhanced by appropriate values of plasma parameters, thickness or eccentricity. The anomalous behavior of backscattering cross-section of plasma coated DB cylinder has been observed at frequencies near plasma frequency. The results may serve as a noteworthy reference for experimentalists working in plasma stealth technology for metamaterials.

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Channel Characterization and Finite-State Markov Channel Modeling for Time-Varying Plasma Sheath Surrounding Hypersonic Vehicles

Cited by 42 publications

References 24 publications

Propagation of phase modulation signals in time-varying plasma

Propagation of phase modulation signals in time-varying plasma

Adaptive Multistate Markov Channel Modeling Method for Reentry Dynamic Plasma Sheaths

Study of the Effects of Eccentric Plasma Coating Over Metamaterial Cylinder

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