In this paper, we present a new algorithm to generate two-dimensional (2D) permutation vectors’ (PV) code for incoherent optical code division multiple access (OCDMA) system to suppress multiple access interference (MAI) and system complexity. The proposed code design approach is based on wavelength-hopping time-spreading (WHTS) technique for code generation. All possible combinations of PV code sets were attained by employing all permutations of the vectors with repetition of each vector weight (W) times. Further, 2D-PV code set was constructed by combining two code sequences of the 1D-PV code. The transmitter-receiver architecture of 2D-PV code-based WHTS OCDMA system is presented. Results indicated that the 2D-PV code provides increased cardinality by eliminating phase-induced intensity noise (PIIN) effects and multiple user data can be transmitted with minimum likelihood of interference. Simulation results validated the proposed system for an agreeable bit error rate (BER) of 10−9.

中文翻译：

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用于光码分多址系统的二维置换向量 (PV) 代码

在本文中，我们提出了一种为非相干光码分多址 (OCDMA) 系统生成二维 (2D) 置换向量 (PV) 代码的新算法，以抑制多址干扰 (MAI) 和系统复杂性。所提出的代码设计方法基于用于代码生成的波长跳跃时间扩展 (WHTS) 技术。PV 代码集的所有可能组合都是通过使用向量的所有排列并重复每个向量权重 (W) 次来获得的。此外，通过组合一维-PV码的两个码序列来构造2D-PV码集。提出了基于二维光伏代码的WHTS OCDMA系统的收发器架构。结果表明，2D-PV 代码通过消除相位感应强度噪声 (PIIN) 效应提供了更高的基数，并且可以以最小的干扰可能性传输多用户数据。仿真结果验证了所提出的系统的误码率 (BER) 为 10-9。