【摘要】 多址干扰(MAI)是影响光码分多址(OCDMA)系统性能的主要因素.为了减小MAI的影响,通过对LSOOC码修正,提出了一种适合光谱幅度编码光码分多址(SAC-OCDMA)地址码的构造方法.分析了码字特性,设计了可调谐FBGs编解码器,阐述了编解码原理.分析结果表明,该码字容量大,编解码方法简单,在光源和信道理想条件下可以消除多址干扰.更多还原

【Abstract】 Multiple access interference(MAI) is the main reason for performance degradation of optical CDMA system.In order to reduce the influence of MAI,a new code structure for spectral-amplitude-coding optical CDMA system based on modifying LSOOC is proposed.It also proposed the structure of spectral encoder/decoder based on tunable Fiber Bragg gratings.Principle analysis of the encoder/decoder and characteristic analysis of the new code have been done.The results reveal that the new code has quite large capacity and is easy to encode and decode.MAI can be canceled at an ideal source and channel.更多还原