Performance of rectangular QAM/FSO communication systems in the anisotropic non-Kolmogorov ground-to-satellite uplink

Zhai, Chao

doi:10.1364/jocn.456657

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…ellite uplink under weak turbulence [1]. Then, based on rectangular quadrature amplit modulation (RQAM), two new modulation techniques emerged, namely cross quadra amplitude modulation (XQAM) and hexagonal quadrature amplitude modula (HQAM).…”

Section: Model Of Satellite Laser Communication Systemmentioning

confidence: 99%

“…Free-space optical (FSO) communication technology can realize efficient wireless broadband communication by using a laser beam as a data carrier, which has obvious advantages with respect to data rate, confidentiality, terminal size, weight, power consumption, and anti-interference, so it is widely used in the satellite communication field [1]. The satellite laser link has the advantages of large capacity, comprehensive coverage, low power consumption, and low cost, meaning that it has garnered significant attention from the academic community [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…There is an error compared with the actual situation. Primarily, when the beam propagates in the vertical or non-horizontal direction, the non-Kolmogorov effect of atmospheric turbulence is more apparent [1,17]. It has not been reported that the HAP in the stratosphere adopts an anisotropic non-Kolmogorov turbulence model in the backhaul optical communication between ground and satellite.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with traditional quadrature amplitude modulation (QAM), rectangular quadrature amplitude modulation (RQAM) improves power efficiency and data transmission rate [21]. Chao Zhai studied the BER performance of the FSO communication system using a rectangular quadrature amplitude modulation (RQAM) scheme in ground-to-satellite uplink under weak turbulence [1]. Then, based on rectangular quadrature amplitude modulation (RQAM), two new modulation techniques emerged, namely cross quadrature amplitude modulation (XQAM) and hexagonal quadrature amplitude modulation (HQAM).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Performance of HQAM/XQAM Laser Communication System in Anisotropic Non-Kolmogorov Ground–HAP–Satellite Uplink

Jiang

Wang

2023

Photonics

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Satellite laser communication can achieve high-speed, high-precision, and high-security broadband communication without being constrained by the electromagnetic spectrum, which has attracted attention. So, this paper proposes the use of a high-altitude platform (HAP) under anisotropic non-Kolmogorov turbulence to improve the communication performance of the system. Cross quadrature amplitude modulation (XQAM) and hexagon quadrature amplitude modulation (HQAM) are applied to the ground–HAP–satellite (G-H-S) laser communication system. Considering the combined effects of uplink light intensity scintillation, beam wander, and the angle of arrival fluctuation, the G-H-S system’s bit error rate (BER) closure expression is derived under the EW distribution. Simultaneously, the relationship between the G-H-S system’s signal-to-noise ratio (SNR) and BER under different anisotropic factor u values is simulated and compared with the traditional ground–satellite (G-S) system. The results show that the communication performance of the G-H-S system with HQAM modulation is better. In addition, the effects of the zenith angle, receiving aperture, transmitter beam radius, and beam divergence angle on the BER performance of the system are also studied. Finally, the correctness of the analysis results is verified via Monte Carlo simulation. This research will benefit the design and optimization of satellite laser communication systems.

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Section: Model Of Satellite Laser Communication Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance of HQAM/XQAM Laser Communication System in Anisotropic Non-Kolmogorov Ground–HAP–Satellite Uplink

Jiang

Wang

2023

Photonics

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“…Free space optical (FSO) communication has attracted great attention due to its advantages over radio frequency (RF) communication, such as very high bandwidth, heavily secured links, robustness to electromagnetic interference, and ease of deployment [6], [7], [8]. In addition, the combination of FSO communication and satellite technology can achieve ubiquitous coverage and high transmission capacity which can meet the future requirements [9], [10]. However, FSO communication requires perfect line-of-sight (LOS) connectivity due to its narrow transmit bandwidth.…”

Section: Introductionmentioning

confidence: 99%

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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Emulation and Testbed Prototyping of Laser Beam Propagation Characteristics through Atmospheric Turbulence for Optical Satellite Feeder Links

Al-Juboori

2024

EPJ Web Conf.

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Two classical scenarios in space communications can be examined to evaluate the link performance of free space optical communications (FSO). These scenarios include the downlink and uplink between earth ground stations and near earth geostationary (GEO) satellites, as well as between the earth and spacecraft that are located a significant distance from the earth (i.e., one or more astronomical units (AU) away). Deep space is often defined as being more than 0.01 AU, or around 1,500,000 km, from Earth. In the first part of this analytical research, various practical system characteristics for optical lasers, telescopes, transmitters, receivers, and atmospheric disturbances, including absorption and scintillation, are taken into consideration. The simulation outcomes were compared to significant experimental data from DLR & JAXA’s OICETS/Kirari-Japan to validate the extended simulation model. Additionally, this work will propose a synthetic effects-based optical turbulence generator in order to deeply investigate atmospheric turbulence disturbances in free-space optical communication systems and support the advancement of artificial intelligence processing-based mitigation solutions. Worth mentioning, the initial outcomes and analytical comparisons demonstrate the preliminary viability of the simulation model for the link budget and scintillation estimation for FSO investigations, which can give deep insight into the development of the proposed testbed prototyping, machine learning-based laboratory measurement system, and enhancement possibility for FSO project design and execution for longand medium-term space mission planning.

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Performance of rectangular QAM/FSO communication systems in the anisotropic non-Kolmogorov ground-to-satellite uplink

Cited by 6 publications

References 23 publications

Performance of HQAM/XQAM Laser Communication System in Anisotropic Non-Kolmogorov Ground–HAP–Satellite Uplink

Performance of HQAM/XQAM Laser Communication System in Anisotropic Non-Kolmogorov Ground–HAP–Satellite Uplink

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

Emulation and Testbed Prototyping of Laser Beam Propagation Characteristics through Atmospheric Turbulence for Optical Satellite Feeder Links

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