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基于扩展二次同余码/单重合序列(EQC/OCS),利用光纤布拉格光栅(FBG)和光纤延迟线作为编解码器,对二维非相干光码分多址(OCDMA)系统进行系统仿真。通过软件仿真,实现了4个用户的EQC/OCS码字的解码相关输出结果。结果表明,低成本的FBG编/解码器实现了EQC/OCS码字的编码和相关解码,提高了二维OCDMA系统容量。
Based on extended quadratic congruence code / single coincidence sequence (EQC / OCS), the system simulation of two-dimensional incoherent optical code division multiple access (OCDMA) system is implemented by using fiber Bragg grating (FBG) and fiber delay line as codecs . Through software emulation, the decoding result of EQC / OCS codeword of 4 users is realized. The results show that the low-cost FBG encoder / decoder can realize the encoding and decoding of EQC / OCS code words and improve the capacity of two-dimensional OCDMA system.