6 November 2023
Proposes optimizing RIS placement on buildings to improve satellite coverage
Models environment and derives lower bound for coverage gain
Formulates optimization problem to maximize non-line-of-sight user coverage
Employs genetic algorithm to obtain effective RIS placement strategy
Simulations show significant gains in non-line-of-sight user coverage
Using surfaces to improve satellite signal coverage
This paper proposes a method to optimize the placement of reconfigurable intelligent surfaces (RIS) on buildings, to improve satellite communication coverage for users blocked by buildings. The surfaces can redirect signals to reach these non-line-of-sight users. After modeling the environment and deriving a theoretical lower bound for coverage improvement, the authors formulate an optimization problem to maximize user coverage across satellite positions. Using a genetic algorithm, they obtain an effective RIS placement strategy. Simulations demonstrate significant gains in non-line-of-sight user coverage probability through this approach.
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