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

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.