Abstract

Hybrid optical two-dimensional (2D) codes due to their large cardinality and improved system performance for constant weight have recently been designed and studied for optical CDMA system. In this manuscript, an attempt has been made to analyze the performance of four different 2D codes from a communication point of view; that describe their use to support a system under certain conditions. These hybrid 2D codes employ (n, w, λ_a, λ_c) optical orthogonal coding for one dimension that is for time spreading and synchronized prime sequences (SPS), synchronized quadratic congruence sequences (SQC), prime code sequences (PC), and synchronized prime procession (SPP) for other dimension that is for wavelength hopping respectively. The distinguishing property amongst the four codes lies in their values of maximum auto- and cross- correlation function. It has been observed that with the constant value of weight, the code with the largest code length parameter has shown the best performance while the code with the least code length gives the poorest performance. Investigations reveal that SPS/OOC code performs better in comparison to other codes with constant weight and for different number of wavelengths and SQC/OOC results in poor performance due to lesser code length.

中文翻译：

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使用（n，w，λa，λc）OOC对恒定权重混合二维码进行性能分析。

摘要

混合光学二维（2D）代码由于其大基数和恒定重量的改进系统性能，最近已经针对光学CDMA系统进行了设计和研究。在本手稿中，已尝试从通信的角度分析四种不同的2D代码的性能。描述它们在特定条件下用于支持系统的用途。这些混合二维码雇用（Ñ，瓦特，λ_一个，λ _Ç）用于时间扩展的一维光正交编码和用于跳频的另一维的同步素数序列（SPS），同步二次同余序列（SQC），素码序列（PC）和同步​​素数处理（SPP）分别。四个代码之间的区别在于最大自相关函数和互相关函数的值。已经观察到，在权重值为常数的情况下，具有最大代码长度参数的代码显示出最佳性能，而具有最小代码长度的代码给出了最差的性能。调查显示，与其他具有恒定权重的代码相比，SPS / OOC代码的性能更好，并且对于不同数量的波长，SQC / OOC由于代码长度较短，因此性能较差。