Design of optical orthogonal codes with variable chip rate for flexible optical CDMA systems
Design of optical orthogonal codes with variable chip rate for flexible optical CDMA systems
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发表时间：
2012-04
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通讯作者：
T. Tsujioka;H. Yamamoto
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作者：
T. Tsujioka;H. Yamamoto
为了增加光正交码的灵活性，如变码长、变码重等，许多研究者对光正交码进行了研究。最近，作者提出了可变码片速率的光码（VC-OOC），即使在光CDMA网络中使用不同的码片速率码进行信号复用时，它也可以保持严格OOC的正交特性。本文在回顾VC-面向对象码的基础上，提出了利用平衡不完全区组设计（BIBD）序列进行码设计的方法。得到了适用于变码片速率码的BIBD参数，并对其进行了讨论。
Optical orthogonal codes (OOCs) have been studied by many researchers to increase its flexibility such as variable code length and variable code weight. Recently, the authors have proposed OOCs with variable chip rates (VC-OOC), which can keep the orthogonal property of the strict OOC even when different chip rate codes are used in an optical CDMA network for signal multiplexing. In this paper, the VC-OOCs are reviewed and some approaches of code design using the balanced incomplete block design (BIBD) sequences are proposed. The BIBD parameters suitable for the variable chip rate codes are obtained and discussed.