In this paper, the capacity of the Starlink global satellite system is considered and evaluated. We will evaluate using the link budget. The code gain due to the addition of error-correcting coding has been added to the calculation of the link budget. At high frequencies, the orbit height is limited to 340 km. Most of the satellites are planned to be located at this altitude. For lower frequencies, higher orbits can be used: 550 km and 1110 km. To date, the spectral efficiency of possible variations of Starlink is limited to 4.5 bits/Hz. At the time of this writing, there are approximately 3300 Starlink satellites in orbit, which theoretically provides a capacity of about 20 Tbps due to the reduced level of modulation and the use of only one polarization. At the end of the first stage of launching satellites into orbit, the system capacity will be 88.5 Tbps over most of the studied frequency band and it will increase as more satellites are launched into low-earth orbit. Working in the future in dual polarizations with 64QAM and with a planned 11 943 satellites, SpaceX will be able to provide Internet access anywhere in the world with high bandwidth and spectral efficiency.
B. Sklar, “Digital Communications, Fundamentals and Applications”, 2nd ed. Prentice Hall PTR, 2001, ISBN: 0-13-084788-7.
“World's most advanced broadband satellite internet,” Starlink, [Online]. Available: https://www.starlink.com/technology.
T. E. Humphreys and et al., “Signal Structure of the Starlink Ku-Band Downlink,” arXiv, Oct. 2022, [Online]. Available: https://doi.org/10.48550/arXiv. 2210.11578.
“FCC approves SpaceX’s plan to provide broadband services with Starlink satellites,” GeekWire, Feb. 2018. [Online]. Available: https://www.geekwire. com/2018/fcc-approves-spacexs-plan-provide-broadband-services-starlink-satellites/.
A. Boyle, “SpaceX files FCC application for internet access network with 4,425 satellites,” GeekWire, Nov. 2016, [Online]. Available: https://www.geekwire.com/2016/spacex-fcc-application-internet-4425-satellites/.
S. Cakaj, “The Parameters Comparison of the ‘Starlink’ LEO Satellites Constellation for Different Orbital Shells,” Frontiers in Communications and Networks, vol. 2, no. 7, 2021.
T. G. Reid and et al., “Broadband LEO constellations for navigation,” Navigation, Journal of the Institute of Navigation, vol. 65, no. 2, pp. 205-220, 2018.
T. G. R. Reid and et al., “Position, Navigation, and Timing Technologies in the 21st Century: Integrated Satellite Navigation, Sensor Systems, and Civil Applications,” in Wiley-IEEE, vol. 1, 2020, ch. Navigation from Low Earth Orbit: Part 1: Concept, Capability, and Future Promise, pp. 1359-1380.
Z. M. Kassas, “Position, Navigation, and Timing Technologies in the 21st Century: Integrated Satellite Navigation, Sensor Systems, and Civil Applications,” in Wiley-IEEE, vol. 1, 2020, ch. Navigation from Low Earth Orbit: Part 2: Models, Implementation, and Performance, pp. 1381-1412.
A. Aguilar, P. Butler, J. Collins, and M. Guerster, “Tradespace exploration of the next generation communication satellites,” in AIAA Scitech 2019 Forum, 2019.
S. Pekhterev, “The bandwidth of the StarLink constellation and the assessment of its potential subscriber base in USA,” SatMagazine, Nov. 2021, pp. 54-57.
M. G. Kim and H. S. Jo, “Performance Analysis of NB-IoT Uplink in Low Earth Orbit Non-Terrestrial Networks,” Sensors, vol. 22, no. 18, Sep. 2022, Art no. 7097, [Online]. Available: https://doi.org/10.3390/ s22187097.
J. G. Proakis and M. Salehi, “Digital Communications”, 5th ed. McGraw-Hill, 2007.
V. A. Breskin and D. M. Rozenvasser, “Optical transport network capacity optimization,” in 2nd International Conference on Information and Telecommunication Technologies and Radio Electronics, UkrMiCo 2017 - Proceedings, 2017, doi:10.1109/UkrMiCo.2017.8095407.
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