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，成为当前全光接入技术的研究热点[1-3]。常见的正交再调制技术中，相域

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，成为当前全光接入技术的研究热点[1-3]。常见的正交再调制技术中，相域
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，成为当前全光接入技术的研究热点[1-3]。
常见的正交再调制技术中，相域/幅域(即调相/调幅)的正交调制格式组合得到人们的广泛关注和深入研究，如BPSK/OOK[4],DPSK/OOK[5-6],DQPSK/OOK[7]等，也有人研究了IRZ/OOK[8]和FSK/IM[9]的正交再调制技术，只不过鉴于其比较明显的技术劣势，并没有能引起人们的进一步关注。
本文主要研究调相/调幅的正交调制组合，相域调制格式主要考察DQPSK而幅域调制格式主要考察PPM。
基于DQPSK/PPM再调制技术的单向OCDMA-PON系统方案，除了所用再调制技术有别于图1所示方案结构图中的DQPSK/OOK组合之外，其他部分完全一样，而DQPSK/PPM再调制技术在第四章中已经做过详细的介绍，其实现方法以及与DQPSK/OOK组合的区别也进行了重点说明，所以在图1所示系统结构图基础上，我们只需用DQPSK/PPM再调制技术替换其中的DQPSK/OOK再调制技术，即可得到基于DQPSK/PPM正交再调制技术的WDM/OCDMA-PON系统图。

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，成为当前全光接入技术的研究热点[1-3]。常见的正交再调制技术中，相域
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...

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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 access etc, and become the all optical access technology research hot spot [1-3].
Common orthogonal to modulation, the phase domain/picture domain (i.e. phase-modulation/am) of orthogonal modulation format combination to get people's attention and thorough research, such as BPSK/OOK [4], DPSK/OOK [5-6], DQPSK/OOK [7], etc, and some studies the IRZ/OOK [8] and FSK/IM [9] of orthogonal and modulation technology, just as the more obvious technical disadvantage, and 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 become the all optical access technology research hot spot [1-3].
Common orthogonal to modulation, the phase domain/picture domain (i.e. phase-modulation/am) of orthogonal modulation format combination to get people's attention and thorough research, such as BPSK/OOK [4], DPSK/OOK [5-6], DQPSK/OOK [7], etc, and some studies the IRZ/OOK [8] and FSK/IM [9] of orthogonal and modulation technology, just as the more obvious technical disadvantage, and there is none that can cause further attention from people.
This paper mainly studies phase-modulation/an am a quadrature combination, phase modulation format main investigation domain DQPSK and modulation amplitude domain format mainly inspects PPM.
Based on DQPSK/PPM again modulation technology one-way OCDMA system solution-PON, in addition to modulation technology used different from figure 1 scheme of the structure of the DQPSK/OOK outside combination, and the other part just the same, and DQPSK/PPM again modulation technology in chapter 4 has made the detailed introduction, its realization methods and DQPSK/OOK combination of the difference between the key that also, so in figure 1 based on the structure of the system, we need to use DQPSK/PPM again modulation technology replace one of the DQPSK/OOK and modulation technology, you will get DQPSK/PPM based on orthogonal to modulation technology of WDM/OCDMA-PON system diagram.
希望可以帮到你，O(∩_∩)O谢谢~！

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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...

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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 become the all optical access technology research hot spot [1-3].
Common orthogonal to modulation, the phase domain/picture domain (i.e. phase-modulation/am) of orthogonal modulation format combination to get people's attention and thorough research, such as BPSK/OOK [4], DPSK/OOK [5-6], DQPSK/OOK [7], etc, and some studies the IRZ/OOK [8] and FSK/IM [9] of orthogonal and modulation technology, just as the more obvious technical disadvantage, and 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 become the all optical access technology research hot spot [1-3].
Common orthogonal to modulation, the phase domain/picture domain (i.e. phase-modulation/am) of orthogonal modulation format combination to get people's attention and thorough research, such as BPSK/OOK [4], DPSK/OOK [5-6], DQPSK/OOK [7], etc, and some studies the IRZ/OOK [8] and FSK/IM [9] of orthogonal and modulation technology, just as the more obvious technical disadvantage, and there is none that can cause further attention from people.
This paper mainly studies phase-modulation/an am a quadrature combination, phase modulation format main investigation domain DQPSK and modulation amplitude domain format mainly inspects PPM.
Based on DQPSK/PPM again modulation technology one-way OCDMA system solution-PON, in addition to modulation technology used different from figure 1 scheme of the structure of the DQPSK/OOK outside combination, and the other part just the same, and DQPSK/PPM again modulation technology in chapter 4 has made the detailed introduction, its realization methods and DQPSK/OOK combination of the difference between the key that also, so in figure 1 based on the structure of the system, we need to use DQPSK/PPM again modulation technology replace one of the DQPSK/OOK and modulation technology, you will get DQPSK/PPM based on orthogonal to modulation technology of WDM/OCDMA-PON system diagram.

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