摘要
首先介绍了光正交码(OOC)的构造方法,以及光谱幅度编码光码分多址(SAC-OCDMA)系统的实现原理。通过分析超辐射发光二极管(SLD)光源的功率谱不平坦对系统信干比和误码性能的影响,给出了OOC选码方案与光源光谱特性的关系;在此基础上,通过对接收信号进行不同的权重处理,达到改善信干比的效果。仿真结果显示,该方法在更多用户同时上路时能够提高信干比、改善通信质量,为系统的可实现提供了一种简便方法。
The constructions of optical orthogonal code（OOC） and realizing principles of SAC-OCDMA system are introduced.Then the effects of the unsmooth power spectrum of the superradiance light emitting diode（SLD） light source on the performance of SAC-OCDMA system are analyzed.And the relationship between code-choosing rules and the spectrum bound of light source is given.Based on which,different weight factors are handled on received signals to improve the signal-to-interference ratio（SIR）.Simulation results show that this method can effectively increase SIR and the communication quality when simultaneous subscribers exist,offering a simple method for the realization of SAC-OCDMA system.
出处
《半导体光电》
CAS
CSCD
北大核心
2011年第5期680-683,688,共5页
Semiconductor Optoelectronics
基金
陕西省教育厅专项科研计划项目(2010JK839)
