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High-capacity and secure inter-satellite optical wireless communication using 2D DPS-OCDMA.

Ammar Armghan1, Somia A Abd El-Mottaleb2, Sultan S Aldkeelalah3

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Summary

This study enhances inter-satellite optical wireless communication (IsOWC) using 2D-OCDMA with DPS codes. The improved system achieves high capacity and secure 120 Gbps data rates over 16,000 km links.

Keywords:
2D diagonal permutation shift code (2D DPS)Bit error rate (BER)Intersatellite optical wireless communication (IsOWC) systemOptical efficienciesPointing errorReceiver aperture diameter

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Area of Science:

  • Satellite communication
  • Optical wireless communication
  • Information theory

Background:

  • Inter-satellite optical wireless communication (IsOWC) is crucial for next-generation satellite networks, requiring high capacity and security.
  • System efficiency in IsOWC is sensitive to factors like aperture size, pointing errors, and propagation losses.
  • Existing IsOWC models face challenges in maintaining performance over long distances.

Purpose of the Study:

  • To propose an enhanced IsOWC model using 2D-OCDMA with diagonal permutation shift (DPS) codes.
  • To improve link capacity and ensure secure data transmission in satellite networks.
  • To evaluate the performance of the proposed model under various channel conditions.

Main Methods:

  • Implementation of a two-dimensional optical code division multiple access (2D-OCDMA) system.
  • Utilizing diagonal permutation shift (DPS) codes for enhanced security and capacity.
  • Assessing system performance by varying inter-satellite link distance, receiver aperture diameter, pointing errors, and optical efficiency.
  • Evaluating metrics such as bit error rate (BER) and Q-factor.

Main Results:

  • The proposed 2D-OCDMA model significantly enhances transmission quality in IsOWC.
  • Reliable communication was achieved over inter-satellite distances up to 16,000 km.
  • The system demonstrated inherent security due to the unique 2D DPS code sequences.
  • An overall data rate of 120 Gbps was supported with BER below the FEC threshold.

Conclusions:

  • The 2D-OCDMA approach, utilizing DPS codes, is effective for enhancing IsOWC capacity and security.
  • The model provides a robust solution for long-distance, high-speed satellite communication.
  • The proposed system meets the stringent requirements for future satellite network development.