Abstract
To overcome the multi-path effect in Visible Light Communication (VLC) Quasi-Synchronous (QS) Optical Code Division Multiple Access (OCDMA) system, Optical Zero Correlation Zone (OZCZ) code set pair have been proposed. In this article, new two methods for constructing OZCZ codes based on the Double Weight (DW) and the Zero Cross Correlation (ZCC) matrix are presented. The newly proposed methods are based on ZCC constructions that allow generating code sequences having all ZCC and OZCZ properties, ideal for use in VLC-QS-OCDMA transmission. The structure of the proposed ZCC-OZCZ code is simple, less complex, and their construction is more flexible than proposed DW-OZCZ and existing construction. In addition, the performance evaluation of the system adopting the proposed constructions, in terms of Bit Error Rate (BER), show that the proposed codes significantly reduce MAI compared to ZCC, and give the same performance as unipolar OZCZ codes with more simple and flexible construction.
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This work was supported by Directorate General for Scientific Research and Technological development (DGRSDT). This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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