Review of channel models for deep space communications

Pan, Xiaoming; Zhan, Yafeng; Wan, Peng; Lu, Jianhua

doi:10.1007/s11432-017-9345-8

Cited by 10 publications

(7 citation statements)

References 14 publications

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“…However, in Feria et al, 11 the modified Rician distribution was stipulated for the received EM wave intensity in deep space communications. Moreover, the distribution parameters were given in terms of the measurable scintillation index (SI), which made the distribution the basis of further theoretical investigations 12,13 . Furthermore, in Morabito, 14 it was shown that the proposed Rician distribution agrees very well with measurements of the field amplitude received from a spacecraft over a large range of SI.…”

Section: Introductionmentioning

confidence: 88%

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Probability density of irradiance for electromagnetic waves propagating under multiple scattering effects: Application to deep space communications

Shishter

2021

Int J Communication

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Summary Electromagnetic waves propagating in random mediums are susceptible to attenuation and fading effects. Therefore, to asses systems performances, it is required to determine the field intensity distribution. Extensive researches were carried out under the assumption of weak fluctuations conditions, in which case the Born and Rytov solutions are valid, and it is fairly established that the resultant distributions agree well with experimental data. In particular, the Rician distribution was shown to fit measurements data from a spacecraft in the event of solar superior conjunction. However, the problem under strong fluctuations is more challenging. In this case, multiple scattering effects need to be included. Numerous atmospheric‐based distributions were introduced, but similar results for deep space communications are still scarce. In this paper, by considering double scattering processes, a novel intensity distribution model is introduced which agrees with the Rician distribution under weak fluctuations and which extends to strong fluctuations conditions. Moreover, the distribution is considered for the applications of deep space communications.

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Section: Introductionmentioning

confidence: 88%

“…However, the second moment requires the evaluation of terms to fourth order in (18). These terms can be evaluated in a lengthy straightforward manner, recalling the definitions (12) and (13). Carrying the evaluation for the term…”

Section: Distribution Momentsmentioning

confidence: 99%

Probability density of irradiance for electromagnetic waves propagating under multiple scattering effects: Application to deep space communications

Shishter

2021

Int J Communication

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“…This work considers the binary frequency shift keying (BFSK), widely used digital modulation scheme in amateur radio links, to generate the transmitted symbols. Moreover, the transmitted signals are degraded using the additive white Gaussian noise (AWGN), a simple but powerful model in satellite communications [16]. Possible configuration of such system can be illustrated in Fig.…”

Section: Current State Of the Art: Single-modementioning

confidence: 99%

Collaborative Network of Ground Stations with a Virtual Platform to Perform Diversity Combining

Al-Anbagi

Veřtát

2022

2022 International Conference on Applied Electronics (AE)

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A conventional ground station can establish a single downlink with only one satellite at a time through steerable high-gain antenna. In addition to the lack of tracking more than one satellite at once, such single radio communication is highly vulnerable to outages when experiencing severe degrading circumstances or even with steering engine failures. Accordingly, such problematic single radio link would leave the operator with no alternative options to overcome the consequences. This work exhibits a solution to the ground station through networking. Multiple ground stations, with omnidirectional antennas instead of the steerable directive ones, can be engaged in a collaborative network to receive multiple versions of the same transmitted data for processing and combining. The suggested receive diversity combining is performed at a virtual ground station which utilizes a combining algorithm to help detect the original data from the received versions with less errors and hence reflecting more efficient and reliable services. To exploit this aimed diversity gain, a simple combining algorithm is also developed in this article. The simulation results from the proposed scheme have indicated significant performance enhancement over the single site ground station. This cooperative scheme will not only improve the system performance but also offer to track more than one satellite at a time.

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“…The success of a series of Chang'E missions inspired China to initial its first Mars Program on January 11, 2016 [3]. Focusing on deep space communications (but without considering the gravitational effect), many aspects have been discussed recently, including communication network design [3]- [5], channel models [6], channel coding [7], laser communications [8]. It is not hard to imagine that mankind will be able to take high-speed spaceship to explore even much deeper space in the near future.…”

Section: Variation Of a Signal In Schwarzschild Spacetimementioning

confidence: 99%

“…where ω 2 is the frequency for a static observer at r 2 who shares the same K r2 with the moving observer at r 2 but has different time direction, and cos ψ = g (u g , k r2 ) / g (k r2 , k r2 ) g (u g , u g ). The second equality in (19) is according to (9), (11) and (14), the second last equality is according to (6) with k = k r2 , and the last equality is according to (7). We denote…”

Section: Frequency Change In Schwarzschild Spacetimementioning

confidence: 99%

Variation of a signal in Schwarzschild spacetime

Liu

Xia

Tao

2019

Sci. China Inf. Sci.

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In this paper, the variation of a signal in Schwarzschild spacetime is studied and a general equation for frequency shift parameter (FSP) is presented. It shows that FSP depends on the gravitationally-modified Doppler effects and the gravitational effects of observers. In addition, rates of time of a transmitter and a receiver may be different. When FSP is a function of the time of a receiver, FSP contributed by gravitational effect (GFSP) or gravitationally-modified Doppler effect (GMDFSP) may lead a bandlimited signal to a nonbandlimited signal. Based on the equation, FSP as a function of the time of a receiver is calculated for three scenarios: a) a spaceship moves away from a star with a constant velocity communicating with a transmitter at a fixed position; b) a spaceship moves around a star with different conic trajectories communicating with a transmitter at a fixed position; c) a signal is transmitted at a fixed position in a star system to a receiver moving with an elliptical trajectory in another star system. The studied stars are sun-like star, white dwarf and neutron star, and some numerical examples are presented to illustrate the theory.

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Review of channel models for deep space communications

Cited by 10 publications

References 14 publications

Probability density of irradiance for electromagnetic waves propagating under multiple scattering effects: Application to deep space communications

Probability density of irradiance for electromagnetic waves propagating under multiple scattering effects: Application to deep space communications

Collaborative Network of Ground Stations with a Virtual Platform to Perform Diversity Combining

Variation of a signal in Schwarzschild spacetime

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