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首页> 外文期刊>Journal of Optics >All-optical TOAD-based Manchester and Gold code generators
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All-optical TOAD-based Manchester and Gold code generators

机译：全光蟾蜍曼彻斯特和金代码发生器

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摘要

Abstract Spread spectrum is a modulation technique where the signal occupies a bandwidth much larger than the minimum necessary to send the information. An all-optical Manchester and Gold code generators are implemented using terahertz optical asymmetric demultiplexer-based D flip-flop and exclusive-OR logic gates in a configuration exactly like the standard electronic setup. The all-optical nonreturnable zero-to-Manchester conversion is implemented in our simulation system, and bit error rate performance (10 Gbit/s) of the format conversion is explained. Transmission performances of the converted Manchester-coded signal are addressed with the transmission length and received optical power. The proposed Manchester and Gold code generators scheme has been theoretically demonstrated in this paper. We are assigned distinguishable unique codes with low cross-correlation values among each other in multiuser environment. The Gold sequences are an important class of sequences which allow construction of long sequences with three-valued cross-correlation function. The Gold sequences are created from pairs of preferred m-sequences of the same length by modulo-2 addition. The performances of those proposed optical designs are evaluated by numerical simulation that confirms its feasibility in terms of the choice of the critical parameters.
机译：摘要扩频是一种调制技术，其中信号占用的带宽大于发送信息所需的最小。使用Terrahertz光学不对称多路分解器的D触发器和逻辑门的全光学曼彻斯特和金代码发生器以标准电子设置完全相同地使用基于Terahertz光学不对称多路分解器的D触发器和逻辑门。在我们的仿真系统中实现了全光无数的零于曼彻斯特转换，并解释了格式转换的误码率性能（10 Gbit / s）。通过传输长度和接收的光功率寻址转换的曼彻斯特编码信号的传输性能。本文理论上证明了拟议的曼彻斯特和金代码发生器方案。我们在多用户环境中分配了具有低互相关值的可区分唯一代码。金序列是一种重要的序列，允许用三值互相关函数构建长序列。通过模数-2加入从相同长度的优选M序列的成对产生金序列。通过数值模拟评估这些所提出的光学设计的性能，该数值模拟可以在关键参数的选择方面证实其可行性。

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