英语翻译光码分多址(OCDMA) 通信具有抗干扰性强、保密性好、充分利用光纤的带宽、容量极大、随机异步接入等优点，成为当

Optical code division multiple access (OCDMA) communications with a strong anti-jamming,privacy,and fully utilize the bandwidth of fibre and advantages of great capacity,random access asynchronously,the current all-optical access technology research [1-3].In General orthogonal modulation technology,domain/site domain (that is,phase/amplitude modulation) combination of orthogonal modulation format received widespread attention and in-depth study,such as BPSK/OOK[4],DPSK/OOK[5-6],DQPSK/OOK[7],have somebody research IRZ/OOK[8] and FSK/IM[9] orthogonal modulation,but given its obvious technological disadvantages,and not a cause for further concern.This major study of orthogonal modulation combined phase/amplitude modulation,phase modulation format primary investigation DQPSK and study on amplitude modulation format primary PPM.Based on DQPSK/PPM then modulation technology of one-way OCDMA-PON system programme,apart from by with then modulation technology is different from Yu figure 1 by shows programme structure figure in the of DQPSK/OOK combination zhiwai,other part full as,and DQPSK/PPM then modulation technology in fourth chapter in the has do had more of describes,its implementation method and and DQPSK/OOK combination of difference also for has focus description,so in Figure 1 by shows system structure figure Foundation Shang,we just with DQPSK /PPM modulation technology replaces one of DQPSK/OOK modulation technique,to get your WDM/OCDMA-PON system based on orthogonal modulation DQPSK/PPM.

Light code division multiple access (OCDMA) communication has the advantages of strong anti-interference, good secrecy, make full use of optical fiber bandwidth, large capacity, random asynchronous ac...

Light code division multiple access (OCDMA) communication has strong anti-interference, good secrecy, make full use of optical fiber bandwidth, large capacity, random asynchronous access etc, and beco...