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Two-Dimensional Permutation Vectors' (PV) Code for Optical Code Division Multiple Access Systems.

Hassan Yousif Ahmed1, Medien Zeghid1,2, Waqas A Imtiaz3

  • 1Electrical Engineering Department, College of Engineering at Wadi Aldwaseer, Prince Sattam Bin Abdulaziz University, Al-Kharj 16278, Saudi Arabia.

Entropy (Basel, Switzerland)
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Summary
This summary is machine-generated.

A new two-dimensional (2D) permutation vector (PV) code algorithm for optical code division multiple access (OCDMA) systems effectively suppresses interference and complexity. This wavelength-hopping time-spreading (WHTS) based code enhances system performance and user capacity.

Keywords:
OCDMAcross-correlationmultiple access interferencephase induced intensity noisevector permutation

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Area of Science:

  • Electrical Engineering
  • Telecommunications
  • Optical Networks

Background:

  • Optical Code Division Multiple Access (OCDMA) systems are crucial for high-capacity communication.
  • Multiple Access Interference (MAI) and system complexity are significant challenges in OCDMA.
  • Existing code designs often struggle to balance performance with scalability.

Purpose of the Study:

  • To introduce a novel algorithm for generating two-dimensional (2D) permutation vectors (PV) code.
  • To suppress Multiple Access Interference (MAI) and reduce system complexity in incoherent OCDMA systems.
  • To enhance the performance and capacity of OCDMA networks.

Main Methods:

  • The proposed algorithm utilizes a wavelength-hopping time-spreading (WHTS) technique for code generation.
  • Two-dimensional (2D) PV code sets are constructed by combining two one-dimensional (1D) PV code sequences.
  • The transmitter-receiver architecture for the 2D-PV code-based WHTS OCDMA system is detailed.

Main Results:

  • The 2D-PV code demonstrates increased cardinality, effectively eliminating phase-induced intensity noise (PIIN) effects.
  • Multiple users can transmit data simultaneously with a significantly reduced likelihood of interference.
  • Simulations confirm the system's effectiveness, achieving a bit error rate (BER) of 10-9.

Conclusions:

  • The developed 2D-PV code offers a promising solution for mitigating MAI and complexity in OCDMA systems.
  • The WHTS technique combined with 2D-PV codes enhances spectral efficiency and system scalability.
  • The proposed system architecture is validated for reliable high-performance optical communication.