Performance analysis of weather‐dependent satellite–terrestrial network with rate adaptation hybrid free‐space optical and radio frequency link

Li, Xin; Li, Yongjun; Zhao, Shanghong; Tang, Huiping; Shao, Lu

doi:10.1002/sat.1468

Cited by 5 publications

(6 citation statements)

References 29 publications

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“…It is very essential to study the cooperative transmission strategy of FSO link and RF link under complex weather conditions. Few works have investigated from the weather conditions perspective and to the best of the authors' knowledge, only research works [35] and [36] have made preliminary research on the impact of weather conditions on FSO/RF system. In [35], considering the effect of weather conditions, a hybrid RF/FSO transmission strategy for satellite communication system was proposed for improving power efficiency.…”

Section: Motivation and Contributionmentioning

confidence: 99%

“…In [35], considering the effect of weather conditions, a hybrid RF/FSO transmission strategy for satellite communication system was proposed for improving power efficiency. In our previous work [36], the performance of weather-dependent satellite terrestrial integrated network with rate adaptation hybrid FSO/RF link was analyzed. However, both of the above works didn't take the impact of relay links into consideration which are of great importance for increasing the duration of each session and further improving the link performance.…”

Section: Motivation and Contributionmentioning

confidence: 99%

“…Using [47, eq. (1.1)], (D.1), can be written in the form of bivariate Fox's H function given in (36)…”

Section: Appendix B Cdf Of the End-to-end Snr Of Modementioning

confidence: 99%

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RIS Assisted UAV for Weather-Dependent Satellite Terrestrial Integrated Network With Hybrid FSO/RF Systems

Li,

Song

et al. 2023

IEEE Photonics J.

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In this paper, we investigate the performance of hybrid free-space optical (FSO) and radio frequency (RF) relay systems in satellite terrestrial integrated network where the effect of weather conditions is taking into consideration. Specifically, we design three different relay schemes in different weather conditions based on high-altitude platform station (HAPS) and reconfigurable intelligent surface (RIS) assisted unmanned aerial vehicle (UAV). The RF link is modeled by shadowed Rician model while the FSO link is assumed to follow the Gamma-Gamma distribution in the presence of path loss, pointing errors and angle-of-arrival (AOA) fluctuations where it operates under either intensity modulation with direct detection (IM/DD) or heterodyne detection (HD). The performance of our proposed scheme is evaluated in terms of outage probability, average bit-error rate (BER) and ergodic capacity in the form of bivariate Fox's H function and bivariate Meijer's G function. Moreover, asymptotic results and diversity order for the outage and average BER at high signal-to-noise ratio (SNR) regime are also obtained to get more insights. Finally, numerical results and comparison scheme are provided to verify the accuracy and superiority of our scheme.

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Section: Motivation and Contributionmentioning

confidence: 99%

Section: Motivation and Contributionmentioning

confidence: 99%

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RIS Assisted UAV for Weather-Dependent Satellite Terrestrial Integrated Network With Hybrid FSO/RF Systems

Li,

Song

et al. 2023

IEEE Photonics J.

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“…Thus, this paper proposes joint beam power and pointing management (JBPPM) based on particle swarm optimization (PSO) to solve the interference coexistence problem between the LEO–LEO co‐existing system. The proposed scheme is different from beamforming (BF), which adjusts the beam pointing and power of the same array antenna to improve energy efficiency 12–14 . In the proposed scheme, beam power control and beam pointing optimization are applied to satellite and ground users, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed scheme is different from beamforming (BF), which adjusts the beam pointing and power of the same array antenna to improve energy efficiency. [12][13][14] In the proposed scheme, beam power control and beam pointing optimization are applied to satellite and ground users, respectively. Specifically, satellites in the LEO2 secondary system adopt beam power control to reduce interference to the primary system user.…”

mentioning

confidence: 99%

Joint beam power and pointing management in multi‐beam low earth orbit and low earth orbit co‐existing satellite system

He,

Cui,

et al. 2024

Satell Commun Network

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SummaryRecently, the low earth orbit (LEO) satellite has attracted much attention due to its advantages of low latency and construction costs. However, the scarcity of frequency spectrum resources has resulted in these satellites sharing the same spectrum to provide services for ground users. So, challenges such as overlapping beam coverage and inter‐beam interference occur in the multi‐beam LEO satellite coexistence scenario. Therefore, this paper focuses on the issue of interference coexistence in LEO and LEO (LEO–LEO) co‐existing scenario, where the initially established system is the primary system, and the later established system is the secondary system. The interference coexistence problem is modeled as a multi‐objective optimization problem. The joint beam power and pointing management (JBPPM) based on particle swarm optimization (PSO) is proposed. The power control is applied to the LEO satellites in the secondary system to reduce the interference to the primary system user. Meanwhile, beam pointing optimization is adopted by the LEO users in the secondary system to avoid interference from the primary system and ensure the minimum communication ability. The simulation results verify that the proposed technique can adapt to various coexistence conditions and outperform the existing method.

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Optical adaptive power control based on atmospheric channel reciprocity for mitigating turbulence disturbances in free-space optics communication

Yao,

Wang,

Zhou

et al. 2023

Opt. Express

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A continuous time-domain adaptive power model of transmitter optical and control algorithm based on atmospheric turbulence channel reciprocity are explored for mitigating the free-space optical communication (FSOC) receiver optical intensity scintillation and bit error rate (BER) deterioration. First, a transmitter optical adaptive power control (OAPC) system architecture using four wavelength optical signals based on atmospheric turbulence channel reciprocity is proposed, and electronically variable optical attenuator (EVOA) and erbium-doped fiber amplifier (EDFA) are employed as the main OAPC units for power adaptation. Moreover, a reciprocity evaluation model for gamma-gamma (G-G) continuous-time signals is generated using the autoregressive moving average (ARMA) stochastic process, which takes into account the delay time and system noise, and a reciprocity-based OPAC algorithm is proposed. Numerical simulations were also performed to analyze the signal reciprocity characteristics under different turbulence, noise, and sampling time mismatch at both ends, as well as the scintillation index (SI) performance under OAPC system operation. Simultaneously, the time-domain signals of continuous quadrature amplitude modulation -16 (QAM-16) and QAM-32 real states are fused with the gamma-gamma (G-G) reciprocal turbulence continuous signals to analyze the probability density function (PDF) and bit error ratio (BER) performance after OAPC correction. Finally, a 64 Gpbs QAM-16 OPAC communication experiment was successfully executed based on an atmospheric turbulence simulator. It is shown that the OAPC correction is carried out using reciprocity at millisecond sampling delay, the light intensity scintillation of the communication signal can be well suppressed, the signal-to-noise ratio (SNR) is greatly improved, the suppression is more obvious under strong turbulence, the overall BER reduction is greater than 2.8 orders of magnitude with the OAPC system, and this trend becomes more pronounced as the received power increases, even reach 6 orders of magnitude in some places. This work provides real time-domain continuous signal samples for real signal generation of communication signals in real turbulence environments, adaptive coding modulation using reciprocity, channel estimation, and optical wavefront adaptive suppression, which are the basis of advanced adaptive signal processing algorithms.

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Performance analysis of weather‐dependent satellite–terrestrial network with rate adaptation hybrid free‐space optical and radio frequency link

Cited by 5 publications

References 29 publications

RIS Assisted UAV for Weather-Dependent Satellite Terrestrial Integrated Network With Hybrid FSO/RF Systems

RIS Assisted UAV for Weather-Dependent Satellite Terrestrial Integrated Network With Hybrid FSO/RF Systems

Joint beam power and pointing management in multi‐beam low earth orbit and low earth orbit co‐existing satellite system

Optical adaptive power control based on atmospheric channel reciprocity for mitigating turbulence disturbances in free-space optics communication

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