基于小波包变换码的新型无源光网络上行信号复用和传输方法  

Upstream Date Transmission Based on Wavelet Packet Transform Coding in Passive Optical Network

作　　者：王艺蒙[1] 李蔚(指导)[1] 韩纪龙[1] 姚海涛[1] 余少华[2] 杨奇[2] 

机构地区：[1]武汉光电国家实验室(筹),华中科技大学,湖北武汉430074 [2]光纤通信技术和网络国家重点实验室、武汉邮电科学研究院,湖北武汉430074

出　　处：《中国激光》2014年第6期102-107,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(6177063);国家973计划(2010CB328305);光纤通信和光网络技术国家重点实验室开放基金

摘　　要：提出了一种基于小波包变换正交码的多电平正交编码的无源光网络(PON)中上行信号复用和传输新方法,将PON系统中各个不同的光网络单元(ONU)用户用小波变换正交码来进行调制、复用和传输,能够实现各个不同ONU用户共享一个波长。由于采用了小波变换编码,可以实现数量很多ONU用户同时上行,在ONU端不需要突发光模块以及多波长激光器,因而成本低,传输速率高,接入数量多。给出了基于该方法的上行系统调制、复用和传输的结构模型,并仿真了传输速率为1.25Gb/s和10Gb/s下不同路ONU用户上行传输,仿真结果表明,最大可以实现上行32路,每路10Gb/s,总传输速率达到320Gb/s的高速PON系统。An upstream date transmission method from optical network units （ONUs） to the optical line terminal （OLT） based on wavelet packet multi-level orthogonal coding in passive optical networks （PON） is proposed and studied. Each ONU can be assigned a special coding based on the wavelet packet coding method to share a wavelength. As the wavelet packet coding method is used, the number of ONU can be very large. And there are no need for the burst mode transmitter/receiver module and multi-wavelength lasers. So the proposed system has the advantages of low cost, high data transmission rate and large access number. This upstream system architecture model is established and simulated at the transmission rate of 1.25 Gb/s and 10 Gb/s. Simulation results show 32 ONUs, where each ONU is with a data rate of 10 Gb/s, and the total transmission rate is up to 320 Gb/s .

关 键 词：光通信 无源光网络 光网络单元 上行数据传输 多电平正交编码 小波包变换 

分 类 号：TN915.63[电子电信—通信与信息系统]