频域跳频/时间扩频混合光CDMA编码及其编解码器结构

Hybrid Optical CDMA Coding of Frequency Hopping/Time Spreading and the Structure of Its Coder and Decoder

本文提出了一种新的频域跳频、时间扩频混合光CDMA编码方案 ,并提出了其编、解码器结构 .这种新的编码方案利用 (L ,ω ,1) 光正交码 (OOC)为频域跳频模式 ,以素数码 (PrimeCode)为时间扩频模式 ,我们称之为Prime/OOC码 .该码具有良好的自相关、互相关性能和大的容量 ,更为重要的是 ,该混合码的编、解码器可以通过多布喇格光纤光栅来实现 .相对于时间扩频码分多址系统的编、解码器 ,这种编、解码器更简单 ,容易变址和集成 .

This paper proposes a new hybrid optical CDMA coding scheme of frequency hopping/time spreading together with the structure of its coder and decoder.This new coding scheme uses (L,ω,1)-OOC as frequency hopping pattern,prime code as time spreading pattern,and we call it as Prime/OOC code.This new coding scheme has good performance in autocorrelation,crosscorrelation and code's capacity.More important,the coder and decoder of the hybrid code can be implemented by multiple-bragg grating fiber.Compared with coder and decoder of time spread CDMA system,the coder and decoder are simpler,easier in selecting address and in integration.