Communication For a Space Sunshade System
2024 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE credits
Student thesis
Abstract [en]
By placing millions of space sunshades, of the order of 104 m2 at the sub-Lagrangian point L1',between the sun and Earth, solar radiation can be reduced enough to achieve the necessary temper-ature reduction to enable a slow down of the global warming. The vast amount of space sunshadesposes significant challenges on the communication system, as the probability of interference, whichcan distort information, increases with the number of simultaneously communicating units.This thesis aims to design a potential structure for the communication system that minimizesinterference as much as possible. To reduce the number of simultaneously communicating units, thesunshades are arranged in cell formation, where a mother is placed in the center with daughtersaround that only communicate with their specific cell mother. Direct communication betweenthe Earth and space sunshades is not possible as the interference from solar radiation can causesignificant distortion on the signals. Therefore, relay satellites are placed in orbit around thesub-Lagrangian point L1' at a sufficient distance to avoid the effects of solar radiation. Thus, thecommunication between the mothers and Earth is instead routed via the relay satellites. Sincecommunication between such a large number of entities in space has not been investigated before,this approach could provide a possible basic design framework for designing such infrastructure inthe future.
Place, publisher, year, edition, pages
2024.
Series
TRITA-SCI-GRU ; 2024:174
Keywords [en]
Satellite communication, Relay satellite, Lagrange point, Sub-Lagrange point, Space sunshade, Sunshade system, TT&C, Transfer frame, Telemetry packet, Communication scheme, Ka-frequency band, Forward error correction, Modulation, Channel capacity, Bandpass modulation, Quadrature phase shift keying, Code division multiple access, Orthogonal frequency division multiple access, Cell configuration, Interference, Link budget, Link margin, Solar exclusion zone, Sun outage, Satellites in multiple layers
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-349364OAI: oai:DiVA.org:kth-349364DiVA, id: diva2:1880347
Educational program
Master of Science in Engineering -Engineering Physics
Supervisors
Examiners
2024-07-012024-07-012024-07-01Bibliographically approved