Link Budget Design of Adaptive Optical Satellite Network for Integrated Non-Terrestrial Network

Key technologies for the satellite optical network

“…The efficient space network is more difficult to configure due to the complex and changeable environment compared with the terrestrial network. SDN form provides the centralized management ability by decoupling hardware and software with open Application Programming Interfaces (APIs) [15][16][17][18][19][20]. The global satellite network management makes it feasible to monitor the global network topology and remote maintenance.…”

Simple real-time high-sensitivity heterodyne coherent optical transceiver at intraplane satellite communication

“…To discuss the link budget of intersatellite optical communication, the average ROP P r can be estimated as [19,20]…”

Link budget analysis of bi-directional LEO and GEO optical feeder links advancing the beam wander model’s accuracy

“…In literature, several examples of link budget analysis for OFLs have been reported [8][9][10][11][12][13][14] that show several limits. The majority of the existing literature works is focused on the link budget calculation for specific scenarios of interest, often modeling only one propagation direction, i.e., only uplink 12 or only downlink 13 , while others consider just one propagation theory 10,12,14 . The numerical tool proposed in this paper presents several advantages and novelties with respect to them.…”

“…Among them, beam wander, which leads to pointing errors and increased scintillation, plays a major role in the achievable system performances, as will be deeply explained in the next sections. The proposed model evaluates the pointing loss deriving from beam wander as well as the induced scintillation aggravation, which are overlooked in [8][9][10]14 . Furthermore, the tool allows to overcome the limitation related to the adoption of a coarse link distance approximation in the conventional model describing the turbulence-related beam wander effect, through the possibility of substituting it with: (1) a more accurate geometrical approximation; or (2) with the exact link distance value.…”

“…Indeed, most literature works neglect pointing errors 8,9,14 , or evaluate their impact in a restricted way. For example 10 , only models deterministic pointing errors, unlike 13 that only considers random pointing jitter, while 11,12 apply an approximated model which does not distinguish between random and deterministic errors.…”