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。 Firstly, the construction method of optical Orthogonal Code (OOC) and the realization principle of SAC-OCDMA system are introduced. By analyzing the influence of uneven power spectrum of SLD light source on the signal-to-interference ratio and error performance of the system, the relationship between the OOC code selection scheme and the light source spectral characteristics is given. Based on this, Carry out different weights to achieve the effect of improving the signal-to-interference ratio. The simulation results show that this method can improve the signal-to-interference ratio and improve the communication quality when more users go on the road at the same time, which provides a convenient method for the realization of the system.