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Abstract
This work discusses the modeling and the numerical investigation of Ro-IsOWC link between a low earth orbit LEO and geosynchronous earth orbit GEO satellite. 4-level quadrature amplitude modulation 4-QAM signal with orthogonal frequency division multiplexing OFDM technique has been used to transmit high-speed data between two satellites separated at 35,000 km link distance in outer space. The proposed link performance has been numerically evaluated under the impact of operating wavelength, transmission distance, input power, pointing errors, additional losses, and receiver aperture diameter. Signal-to-noise ratio SNR and received electrical power of the information signal are considered as the performance metrics to evaluate the link performance. Through numerical simulations, we report a successful transportation of 20Gbit/s-40GHz information between two satellites over a transmission distance of 35,000 km using the proposed Ro-IsOWC system. Also, an improved link performance has been investigated in this work by using a Square root module SRm technique at the receiver terminal for non-linearity compensation.
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