Optical code division multiplexing access ( ocdma ) is one of the possible resolutions for all optical communication network in the future , which is a hot topic in optical communication research 光码分多址ocdma ( opticalcodedivisionmultipleaccess )是未来高速全光通信网络的备选方案之一,是目前光通信技术领域研究的热点。
Providing a novel access scheme for solving “ last mile ” wideband access and global person communications . in wireless optical code multiple access ( w - ocdma ) network , media access control ( mac ) is a key issue , which determines network performance 、 bandwidth efficiency 、 complexity and cost of terminal 无线光码分多址( w - ocdma )接入网中,数据链路层的媒质接入控制技术( mac )至关重要,它直接影响网络的性能、带宽利用效率、终端设备的复杂度和成本。
Optical code multiple access ( ocdma ) communication system is a spectral spreading system . all users in the system share all the bandwidth in the same time . because of the using of the almost infinitude bandwidth in the fiber , ocdma system will become more and more important in future ultra - high speed lan and online computer communication system 光码分多址( ocdma )通信系统,作为一种扩展频谱系统,用户同时共享所有带宽,因为可以充分利用光纤中的巨大带宽资源,因此在未来超高速局域网和实时计算机通信系统中将扮演重要角色。
Optical code division multiple access ( ocdma ) is a communication mode which introduces the code division multiple access ( cdma ) technology into optical fiber communication system . besides providing asynchronous communications access , ocdma system has many advantages , such as high capacity , security against interception , suppression of narrow band disturbances , capability in forming variable bit rate networks and multi - rate networks . it implies a great challenge for the development of future communication networks , especially all optical networks 光码分多址( ocdma )是将码分多址( cdma )技术与大容量的光纤通信技术相结合的一种通信方式,其主要优点表现在如下几个方面:允许多个用户随机地接入同一信道:可构成真正“透明”的全光通信网络;具有良好的安全性;允许可变速率或多速率传输,并可同时提供多种业务支持;具有优良好的抗干扰能力,并能够充分地利用石英光纤的可用带宽。
Firstly , the basic principle of ocdma , the basic theory of ooc and the key technologies of ocdma are introduced . the development , research status and trends of ocdma technologies are also summarized . combining with other multiplexing technologies and using fiber gratings as the encoder / decoder are the trends of ocdma system 论文首先对ocdma的基本原理、光正交码的基本理论以及关键技术进行介绍,对光码分多址技术发展历史、研究现状以及发展趋势进行总结,指出同其它复用方式相结合的混合全光网络和采用光纤光栅编解码器是光码分复用技术最有希望的发展方向。